Let Us C - Yeshvant Kanetkar
thanks Sanchayita
the complete reference written by Herbert schildt ...... this the best book for getting best knowledge of C... but for wbut exam let us C is enough .
also you can refer Balaguruswamy
gottfried is the best book
wbut vikas publication written by amitava nag is the easiest book with last 6years question.