Read the following statements and choose the correct option : Assertion (A) : All children who enter school are competent language users according to their age. Reason (R) : Due to language and cultural diversity, they are unable to demonstrate their abilities.

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