Science

It will take you a maximum time of 3 years although most of the people complete the course in two years or 1 and a half years. So it depends on you and your performance.

Yes, mathematics is a compulsory subject to be taken in case you want to take admission in that institute and also you have to get good marks in the subject to get an upper hand.

I am sorry to say but you cannot take admission in any proper method since you have less than 60 percent in your boards and the minimum requirement is 60 percent. However you may choose to take lateral entry.

No, you have to clear that main subject in which you have failed and only then you would be eligible to get admission in BA LLB in any college.

Hello,
According to exam guidelines, candidates who have passed Masters degree or enrolled in the post-graduation course are only eligible for the UGC NET exam. As you said, you have qualified graduation degree so, to apply for the NTA NET firstly you have to enrolled in the post-graduation course.