Regarding Platyhelminthes : Assertion (A): Members of Platyhelminthes are called flatworms. Reason (R): They have dorso-ventrally flattened body. Regarding (A) and (R) :

Question

( a ) Both A and R are correct & R is the correct explanation for A
( b ) A is correct but R is incorrect
( c ) Both A and R are correct but R is not the correct explanation for A
( d ) A is incorrect but R is correct