Physics proved to be a challenging paper for many of the 11.35 lakh aspirants who appeared for the National Eligibility-cumEntrance Test (NEET) in 104 cities on Sunday . Students aspiring to gain admission to medical and dental colleges--whose figure has grown 40% this year--found the paper tough and lengthy; some also claimed that a few questions in the biology section were out of syllabus. Parents at some centres complained that their wards lost time as the papers were not handed out 15 minutes before 10am. At several centres in the city, students were disappointed as they were not allowed to enter minutes after the 9.30am deadline.