I failed in one subject and I want to give improvement exam of an extra subject, other than the failed one. Can this happen in 12th?

Yes, students can join the University of Hyderabad after completing your 12th grade through their 5-year Integrated Postgraduate (PG) programs, 4-year B.S. (Hons), or dual-degree engineering options. 

Yes, candidates can apply for BA LLB admission at Panjab University before Class 12 board exam results are announced. PU UGLAW is open for such candidates and during admission process, BA LLB seats are filled based on entrance exam scores alone.

If you're looking for B.Tech CSE colleges where admission can be based on Class 12 marks, Galgotias University, Sharda University, and LPU are good options. Among them, Galgotias University is a strong choice, especially for students looking for CSE in the Delhi-NCR region with good infrastructure a

To become a Chartered Accountant (full form of CA) after class 12th, you need to first register yourself for the CA foundational course through Institute of Chartered Accountants of India (ICAI).

Then, you need to meet the eligibility criteria and clear the foundational and intermediate exam. You als

No, you can't. Having maths as a core subject in class 12th along with Physics and Chemistry is one of the key requirements for eligibility in a UG level Aeronautical Engineering course.