A2A.
You need to understand that there is a huge difference between the level of NEET and Boards exam. For Boards you have to focus on NCERT alone and for NEET you have to do something extra.
If you want to pursue Medical then
Good marks in Boards + Good NEET Rank = awesome (Life set)
Just qualifying marks in Boards+ Good NEET Rank= awesome ( Life set)
Awesome marks in Boards + Not qualified in NEET= year Drop ( because your aim is to get admission in Medical college)
You have to properly study for both simultaneously.