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 universities that McGuffin  was awarded a Medical Research Council Fellowship at has the highest enrollment? Passage 1:He completed his training as a psychiatrist at the Maudsley Hospital, London and was awarded a Medical Research Council Fellowship to study genetics at the University of London and at Washington University in St Louis, Missouri where he spent a formative 18 months under the mentorship of Theodore (Ted) Reich and Irving I Gottesman. He completed a PhD with a thesis describing one of the first multi marker genetic linkage studies in schizophrenia. He subsequently became an MRC Senior Clinical Fellow at the Maudsley and the Institute of Psychiatry (now part of King's College London) and then took up the Chair of Psychological Medicine at the University of Wales College of Medicine in Cardiff in 1987. He subsequently established the Cardiff department as one of the World’s leading centres for psychiatric genetic research and was among the early pioneers of multi-centre international collaborations in psychiatric genetics such as the European Science Foundation programme on the Molecular Neurobiology of Mental Illness. He moved back to London as successor to Prof Sir Michael Rutter as Director of the MRC Social, Genetic and Developmental Psychiatry Centre at the Institute of Psychiatry in October 1998. From January 2007 to December 2009, he was the Dean of the Institute of Psychiatry. He was elected a founder Fellow of the Academy of Medical Sciences in 1998. Despite his very early Freudian leanings, McGuffin’s research, his books and papers have been mainly on the genetics of normal and abnormal behaviour.
 Passage 2:In 1997 Byker joined Apollo 440. His first contribution was to provide vocals for the song Ain't Talkin' 'bout Dub which peaked at number 7 in the UK Singles Chart. Following this, he and the band recorded their second album Electro Glide in Blue. Byker, Trevor Gray and Howard Gray wrote and produced Liverpool FC's FA Cup Final single Pass & Move (It's the Liverpool Groove) under the name Boot Room Boyz. It reached number 4 in the UK Singles Chart. In 1999 the band released Gettin' High on Your Own Supply. The album proved to be hit and went to number 20 in the UK Album Chart. The album spawned two UK Top 10 singles including the theme to the 1998 movie Lost In Space and Stop the Rock. In 1999 Byker appeared on Never Mind The Buzzcocks and featured as a player on FIFA 2000 with other Apollo 440 members Noko, Trevor Gray and Howard Gray.
 Passage 3:In 1995, Tony was selected to become a member of the NFL officiating staff as a back judge (the title was changed to field judge in 1998) before being promoted to referee at the beginning of the 1998 NFL season. In his three seasons as a back judge, he worked two playoff games including the 1997 NFC Championship Game. Tony also officiated in NFL Europe working the World Bowl in both 1995 (Back Judge) and 1998 (Referee). In 1998, he became a referee after Dale Hamer returned to the head linesman (now down judge) position and Gary Lane returned to the side judge position. Corrente worked the NFC Championship Game in 2001 between the Minnesota Vikings and New York Giants at Giants Stadium in East Rutherford, New Jersey and the 2010 AFC Championship Game between the New York Jets and the Indianapolis Colts at Lucas Oil Stadium in Indianapolis. Since joining the NFL in 1995, Corrente has been involved in 13 post-season assignments including 3 AFC/NFC Championships and as the alternate Referee in Super Bowls XL and 50 and as Referee in Super Bowl XLI between the Chicago Bears and the Indianapolis Colts.
1