Assertion : In the siphon shown in figure, pressure at P is equal to atmospheric pressure.

Reason : Pressure at Q is atmospheric pressure and points P and Q are at same levels.
(a) If both Assertion and Reason are true and the Reason is correct explanation of the Assertion
(b) If both Assertion and Reason are true but Reason is not the correct explanation of Assertion.
(c) If Assertion is true, but the Reason is false.
(d) If Assertion is false but the Reason is true.