In each of the following questions, a statement of Assertion (A) is given and a corresponding statement of Reason (R) is given just below it. Of the statements, mark the correct answer as :
(a) if both A and R are true and R is the correct explanation of A
(b) if both A and R are true but R is not the correct explanation of A
(c) if A is true but R is false
(d) if both A and R are false
Assertion : Blood vascular system in arthropods is of open type.
Reason : In arthropods, blood does not flow in definite vessels but is present in irregular spaces called lacunae.
