Class – Amphibia : 1. Sexes are separate. 2. Fertilisation is external. 3. They are viviparous 4. Development is direct. Regarding 1,2,3 and 4:

Question

( a ) 1 and 2 are correct but 3 and 4 are incorrect
( b ) 1 and 3 are correct but 2 and 4 are incorrect
( c ) 2 is incorrect; 1,3 and 4 are correct
( d ) 4 is incorrect but 1, 2 and 3 are correct