# Let A={2,3,5,7}. For which of the sets, truth value is true?

$\begin {array} {1 1} (A)\;\ni\; x\: \in \: A \: s.t\: x+2 = 6 & \quad (B)\;\forall \: x \: \in \: A,\: x+3\: < 9 \\ (C)\;\forall \: x\: \in \: A,\: x+4\: \geq \: 11 & \quad (D)\;\forall \: x\: \in \: A,\: x\: is\: prime \end {array}$

Ans : (D)
Since 2,3,5,7 are all prime numbers, so it is true