Consider the following statements and select correct answer from the code given below:

Assertion (A): China's growth of population has dramatically slowed down.
Reason (R): Its fertility rate has declined due to one child per family norm.

Code:

A) Both A and R are true are 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) A is false but R is true

This MCQ is part of the UP PSC Previous Year Questions (PYQs) series, focusing on UPPSC Prelims 2003 (GS Paper I)