B.Sc

B.Sc aviation is offered by few institutes like Indira Gandhi Rastriya Uran academy and Thakur college Mumbai. the course cost around 40 lakhs and admission is based on entrance exam a student who has studied physics chemistry and Mathematics with minimum 50 percent at 10+2 level are eligible for it. Indira Gandhi RUA offers CPL combined with B.Sc in aviation.

Dear,
With compartment few private universities can give you provisional admission till your compartment result but you need to clear the main subject in compartment result.
Major and established Universities will not give you Admission on the basis of compartment.
All the best.

You need to check your boards rules and regulations. For example, if you are from Maharashtra State Board, you have to appear for mark improvement within 2 years of clearing HSC exam. For CBSE except vocational stream, you have to appear for mark improvement within a year only I.e. if you have cleared this year, you have to appear maximum next year only.

That depends upon the institution you want to join. Scope of Nursing and scope of MBA is totally different. So, one cannot get you qualification for other.

You can opt for both. According to your study and college, you can manage time for coaching classes.
Good luck.