Assertion (A) : Chemical messenger gives message to the cell without entering the cell.
Reason (R) : Chemical messenger is received at the binding site of receptor proteins.

Options

A. (A) and (R ) both are correct statement but reason does not explain (A)
B. (A) and (R ) both are correct statements and (R ) explains the (A)
C. Both (A) and (R ) are wrong statement
D. (A) is correct statement and (R ) is wrong statement

Explanation

B