Given below are statements : one is labelled as Assretion A and the other is labelled as Reason R.
Assertion A: Nephrons are of two types cortical & juxta medullary, based on their relative position in cortex and medulla
Reason R : juxta medullary nephrons have short loop of henle whereas , corticalnephrons have longer loop of Henle
in the light of the above statements, choose the correct answer from the options given below :

Options

A. Both A and R are true but R is NOT the correct explanation of A.
B. A is true but R is false.
C. A is false but R is true.
D. Both A and R are true but R is the correct explanation of A.