Q: In this task, you're given a question, along with three passages, 1, 2, and 3. Your job is to determine which passage can be used to answer the question by searching for further information using terms from the passage. Indicate your choice as 1, 2, or 3.
Question: How many of the particles emitted in the process of transmuting Np to Pu have a charge? Passage 1:The son of a baptist hotelier, Constandse completed the normal school between 1914 and 1918 and in this period came into contact with the teetotalers movement. In response to World War I, he developed anti-militarist ideas. He joined the Social-Anarchist Youth Organisation (Dutch Sociaal-Anarchistische Jeugd Organisatie, SAJO) in 1919. Within this organisation, he chose the side of the individualist faction within this organisation when factional struggles erupted, denouncing even trade organizations as counterrevolutionary. Instead of taking a job as a teacher, Constandse devoted himself to spreading anarchist ideas. He published two anarchist monthlies, Alarm (1922–1926) and Opstand ("Revolt", 1926–1928), which together with Herman Schuurman's De Moker and Arthur Lehning's Grondslagen renewed the theoretical basis of Dutch anarchism. Constandse's 1927 call for mutiny in De Vrije Socialist ("the free socialist"), following the sending of HNLMS Sumatra to Shanghai, led to a conviction for sedition and a prison sentence of two months.
 Passage 2:Heavy-water reactors may pose a greater risk of nuclear proliferation versus comparable light-water reactors due to the low neutron absorption properties of heavy water, discovered in 1937 by Hans von Halban and Otto Frisch. Occasionally, when an atom of U is exposed to neutron radiation, its nucleus will capture a neutron, changing it to U. The U then rapidly undergoes two β decays — both emitting an electron and an antineutrino, the first one transmuting the U into Np, and the second one transmuting the Np into Pu. Although this process takes place with other moderators such as ultra-pure graphite or beryllium, heavy water is by far the best. 
 Passage 3:While attending vocational school, Takaiwa passed the New Japan Pro Wrestling (NJPW) entry exam and began training with the promotion in 1992. Takaiwa was part of the same trainee class as Shinjiro Otani and the two became frequent opponents and tag team partners when they eventually debuted. Takaiwa debuted on July 21, 1992, losing to Satoshi Kojima. In 1993, Takaiwa took part in the Young Lions Cup, finishing last with zero wins and zero points. During the early years of his career, Takaiwa primarily competed in opening matches, usually on the losing end as is customary for young wrestlers in Japan. Beginning in 1997, Takaiwa began to create more of a name for himself, competing in that year's Best of the Super Juniors tournament and finishing with four points. In 1998, Takaiwa teamed up with Otani to take part in the league to crown the inaugural IWGP Junior Heavyweight Tag Team Champions, with the two of them defeating Koji Kanemoto and Dr Wagner Jr in the finals to become the first ever holders of the belts. In December 1998, Takaiwa received his first shot at the IWGP Junior Heavyweight Championship, unsuccessfully challenging Jushin Thunder Liger. Days later on December 11, Takaiwa and Otani travelled to Wrestle Association R where they defeated Masaaki Mochizuki and Masao Orihara to win the vacant International Junior Heavyweight Tag Team Championship, making themselves double champions. Their days as double champions didnt last long, however, as they would lose the IWGP Junior Heavyweight Tag Team Championship to Kendo Kashin and Dr Wagner Jr at Wrestling World 1999. Later in the year they would regain the championships, defeating Jushin Thunder Liger and The Great Sasuke in July. In 2000, both Otani and Takaiwa took part in the Best of the Super Juniors tournament, with both men winning their blocks and reaching the final, where, on June 9, Takaiwa defeated Otani to win the 2000 Best of the Super Juniors. Later in the month after just under a year as champions, Otani and Takaiwa lost the IWGP Junior Heavyweight Tag Team Championships to the Junior Stars (Koji Kanemoto and Minoru Tanaka). After losing the titles, Takaiwa began focusing more on his singles career, winning the IWGP Junior Heavyweight Championship for the first time in his career in July, defeating Jushin Thunder Liger. Takaiwa eventually lost the championship to Minoru Tanaka in October.

A:
2