JEE Main 2021 Mathematics question

For the statements p and q, consider the following compound statements : (a) (b) Then which of the following statements is correct ?

• (A)(a) and (b) both are not tautologies.
• (B)(a) and (b) both are tautologies.Correct
• (C)(a) is a tautology but not (b).
• (D)(b) is a tautology but not (a).