Regarding vertebrates : 1. They have a ventral muscular heart with two, three or four chambers. 2. They have kidneys for excretion and osmoregulation 3. They have paired appendages which may be limbs but never fins.

Question

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