Which board (cbse/icse/igcse) is most opt for iit?

Both CBSE and CISCE are self-financing education institutions. However, CBSE is recognized by Indian government and ICSE is not. Although the certificates provided by both of them are globally valid, yet CBSE has a better footing in the subcontinent than ICSE. The ISC by CISCE is recognized by many foreign education systems as equivalent to senior examination or high school. Therefore students qualifying ISC are not required to go for bridge courses while seeking admission in colleges abroad.