Exam

The answer key is not out yet. You can get the answer key here once it is released by Resonance -
https://www.resonance.ac.in/answer-key-solutions/JEE-Main/2017/jee-main-2017-AnswerKey-Solutions.php

CLAT score is accepted by many top law colleges. Besides CLAT, CET, SET and AILET are also accepted by some colleges.
The registration for CLAT opens in January and continues till march. Results are out in May. After CLAT results, you can apply to the law colleges and you get admission based on your

Time is over my friend, so now you review your learned and easy topics by NCERT books which is sufficient to qualify the exam.
You can focus mainly on Chemistry to score well.

Hello Kumar,
These days, OBC students have scored quite well & hence cutoffs are almost same as general category. However, with the marks you have scored, I feel you may get admission only on NITs that have come up recently.

It will be between 500 and 1000, depending on the caste.

Yes, it is a good option if you are good in studies.

Both exams are good and the preferred book is NCERT.

Yes, he or she can apply for UPSC exam, but degree must be from valid and recognized university.
But, according to me, you should think of a professional degree, if you not able to crack UPSC.
All the best.