19. Assertion : A block of wood is floating in a tank containing water. The apparent weight of the floating block is equal to zero. Reason : Because the entire weight of the block is supported by the buoyant force (the upward thrust) due to water.

(a)       If both assertion and reason are true and the reason is the correct explanation of the assertion.

(b)       If both assertion and reason are true but reason is not the correct explanation of the assertion.

(c)        If assertion is true but reason is false.

(d)       If the assertion and reason both are false.

(e)       If assertion is false but reason is true.

Answer-a

(13)