JEE Main 2024 Chemistry question

Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A) : There is a considerable increase in covalent radius from N to P. However from As to Bi only a small increase in covalent radius is observed. Reason (R) : Covalent and ionic radii in a particular oxidation state increases down the group. In the light of the above statements, choose the most appropriate answer from the options given below :

• (A)Both (A) and (R) are true and (R) is not the correct explanation of (A)Correct
• (B)(A) is true but (R) is false
• (C)Both (A) and (R) are true and (R) is the correct explanation of (A)
• (D)(A) is false but (R) is true