1. Agnatha includes Class Cyclostomata. 2. Tetrapoda includes Pisces, Amphibia, Reptilia, Aves and Mammals 3. Pisces includes Chondrichthyes and Osteichthyes. Regarding 1,2 and 3:

Question

( a ) 3 is incorrect; 1 and 2 are correct
( b ) 2 is incorrect but 1 and 3 are correct
( c ) 1 is incorrect but 2 and 3 are correct
( d ) All are correct