JEE Main 2023 Chemistry question

Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R. Assertion A : Physical properties of isotopes of hydrogen are different. Reason R : Mass difference between isotopes of hydrogen is very large. In the light of the above statements, choose the correct answer from the options given below:

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