One of my classmate said that some questions of neet come from MBBS 1 st semester and 2 nd semester ...Is it true?

Dear Gunjan, what someone says is different and what is written in the official website id different. NTA is the examination conducting authority and hasn't officially announced any syllabus for NEET. Having said that, NEET is the entrance exam for admission to.MBBS along with other Medical  courses and it is understood that candidates will not have even a faint idea of MBBS syllabus. So no question out of 10+2 syllabus would be given. Now there are times that you have studied certain things in your 10+2 and they might be repeated in MBBS. For example, if there is a question which says 'How many bones does a human body have'? You might have studied it in 10+2 and chances are your friend didn't study that topic. For him it is out of MBBS syllabus while for someone else it is basic human biology. So always go through official websited for relevant and trustworthy information than on word of mouth.