hi,

see attending school is also important, because if you do not have the required attendance percentage you may not allow to sit for board exam, however you need to make separate time schedule to study for board exam as well as prepare for neet, 12th exam is also very important based on this marks you future will be decided, now neet is a competitive exam and you never know how the difficulty level of questions, but if you can not bring good score in 12th exam you can not get a tier 1 college to study bsc or any other courses apart from mbbs, hope you may understand.