Q.

Assertion (A): In water, orthoboric acid behaves as weak monobasic acid.

Reason (R): In water, orthoboric acid acts as proton donor.

1 Assertion (A) is True, Reason (R) is True; Reason (R) is a Correct explanation for Assertion (A)  
2 Assertion (A) is True, Reason (R) is True; Reason (R) is NOT a Correct explanation for Assertion (A)  
3 Assertion (A) is True, Reason (R) is False  
4 Assertion (A) is False, Reason (R) is True  

Ans.

(3)

Assertion (A) is True, Reason (R) is False