Sir/Mam, 1. If very intelligent student want to do IIT to become astronaut, then should he do- (a) CBSE in 9,10,11,12 Class. (b) IGCSE in 9,10 and then 11, 12 by CBSE? (C) IGCSE in 9,10 & IB in 11,12. 2. If financial condition does not permit to go abroad for graduation then in India IGCSE is recommended or not? If yes, why it will be better then CBSE?