Assertion : Sapwood is less durable than the heartwood.
Reason : Hollow tree trunks are due to the disappearance of sapwood.

Options

A. If both the assertion and the reason are true and the reason is a correct explanation of the assertion
B. If both the assertion and reason are true but the reason is not a correct explanation of the assertion
C. If the assertion is true but the reason is false
D. If both the assertion and reason are false

Answer

C

Explanation

Various types of plant products like oils, resins, gums and tanins are deposited in the cells of the heartwood. They are antiseptic. The heartwood is, therefore, stronger and more durable than the sapwood . It is, however, liable to be attacked by wood rotting fungi. Hollow tree trunks are due to their activity. Sapwood (outer light coloured wood) is less durable because it is susceptible to attack by pathogens and insects.