Assertion : Wood is an excellent fuel.
Reason:The average calorific value of seasoned wood is half to coal.

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

B

Explanation

Wood is an excellent fuel since 99% of the over dried wood is combustible, leaving behind about one percent ash. Woods vary greatly in their fuel valve that depends on density and amount of moisture. The average calorific value of seasoned wood is around 4600 cal/Kg, two kilograms of which yield approximately the same heating value as produced by one kilogram of good coal.