Assertion (A) : Open circulatory system is found in all molluscs.
Reason (R) :  In all molluscs, haemolymph directly bathes the internal tissues and organs. 

• A

   Both A and R are true and R is the correct explanation of A.

• B

  Both A and R are true, but  R is not the correct explanation of A.

• C

  A is true, but R is false.

• D

  Both A and R are false.