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:

1. A.Both (A) and (R) are true and (R) is the correct explanation of (A)
2. B.Both (A) and (R) are true, but (R) is not the correct explanation of (A)
3. C.(A) is true, but (R) is false
4. D.(A) is false, but (R) is true