Exam

In these marks, your son can get new NIT in CSE or old NIT in a lower branch.

Look, if you want to join government services or PSUs, don't drop. But still, if you want a good college tag or want to go for CS, then take drop otherwise take admission anywhere. Tag is not everything talent and hard work is something that matters :).

Use Shiksha's college Predictor to know your chances:
https://www.shiksha.com/b-tech/resources/jee-mains-college-predictor?utm_source=connect&utm_medium=CR_JEECP&utm_campaign=6540165.

Use the below link for colleges prediction:
https://www.shiksha.com/b-tech/resources/jee-mains-college-predictor?utm_source=connect&utm_medium=CR_JEECP&utm_campaign=6540165.

Almost all colleges consider MAT scores. So, you better concentrate on preparing for MAT exam without getting disturbed by these things. Once you write MAT exam, you can place your concentration on colleges.

Hello,
Most probably, at this score, the institute will offer you MBA in e business. And if you are interested in this sector, then its all depend upon your interest. So, you can prefer any of these two. Both are good for career growth in the future.
All the best.

You can try the Shiksha's JEE Mains college Predictor. Link is given below:
https://www.shiksha.com/b-tech/resources/jee-mains-college-predictor?utm_source=connect&utm_medium=CR_JEECP&utm_campaign=6540165.