Direction: Question consists of two statements, one labeled as the 'Assertion (A)' and the other as 'Reason (R)'. Examine these two statements carefully and select the answer to this question using the codes given below:Assertion (A): In an intrinsic semiconductor, the electron mobility in the conduction band is different from hole mobility in the valence band.Reason (R): In an intrinsic semiconductor, electrons and holes are created solely by thermal excitation across the energy gap.

• A. Both A and R are individually true and R is the correct explanation of A
• B. Both A and R are individually 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