Given below we two statements, one is labelled as Assertion (A) and the other as Reason (R).Assertion (A): Turkish invasions on India were successful.Reason (R): There was no political unity in North India.Select the correct answer from the codes given below:

• A. Both (A) and (R) are true and (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