Given below are two statements, one is labelled as Assertion (A) and other one labelled as Reason (R).
Assertion (A) : Rectal gland, a specialised anatomical structure, is present in marine elasmobranchs.
Reason (R) : Rectal gland secretes vasopressin which helps in osmoregulation.
In light of the above statements, choose the correct answer from the options given below.