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: Which of the two trading partners of the port of Karachi in the eighteenth century has the largest population now? Passage 1:The Treaty of Speyer or Peace of Speyer was signed on May 23, 1544 between Denmark-Norway and the Holy Roman Empire during an Imperial Diet of the Holy Roman Empire in Speyer, Germany. Danish-Norwegian king Christian III had imposed heavy tolls on the Sound and two other channels between the North Sea and the Baltic sea, in an effort to end the Dutch dominance of trade in the Baltic region. Under pressure from Holy Roman Emperor Charles V, he agreed to exempt the Dutch ships from these tolls and give them free and unfettered access to the Baltic. In the treaty, Charles V also recognized Christian III as the rightful king of Denmark and Norway, and promised not to provide military support to his rival Christian II. The Treaty of Speyer dictated Christian III's foreign policy for the rest of his life. He kept Denmark-Norway at peace, refusing to involve the countries in Protestant-Catholic conflicts such as the Schmalkaldic War of 1546. The Dutch would continue to dominate Baltic trade for another two centuries.
 Passage 2:The Manora Island and was visited by Ottoman admiral Seydi Ali Reis and mentioned in his book Mir'ât ül Memâlik in 1554. According to the British historian Eliot, parts of city of Karachi and the island of Manora at port of Karachi constituted the city of Debal. The island was the site of a small fort constructed in the eighteenth century when the port of Karachi traded with Oman and Bahrain. The Kalmati Baloch tribe was settled in Karachi and they raised an army to defend the port from the British invasion. The Kalmati forces were defeated when the Manora Fort was stormed by the British in 1839 because of the strategic location of Karachi. Although the fort is now buried beneath the naval base, the lighthouse is a visible reminder of the British presence having been built in 1889 by the Canadian engineer Alain-Chartier-de-Lotbiniere Joly de Lotbinière to assist vessels approaching Karachi harbor.
 Passage 3:Scottish field armies rarely managed to stand up to the usually larger and more professional armies produced by England, but they were used to good effect by Robert I of Scotland at the Battle of Bannockburn in 1314 to secure Scottish independence. He adopted a policy of slighting castles and made use of naval power to support his forces, beginning to develop a royal Scottish naval force. In the Late Middle Ages under the Stewart kings these forces were further augmented by specialist troops, particularly men-at-arms and archers, hired by bonds of manrent, similar to English indentures of the same period. New "livery and maintenance" castles were built to house these troops and castles began to be adapted to accommodate gunpowder weapons. The Stewarts also adopted major innovations in continental warfare, such as longer pikes, the extensive use of artillery, and they built up a formidable navy. However, one of the best armed and largest Scottish armies ever assembled still met with defeat at the hands of an English army at the Battle of Flodden in 1513, which saw the destruction of a large number of ordinary troops, a large section of the nobility and King James IV.
2