Statement-1: Combustion of all organic compounds is an exothermic reaction .
Statement-2: The enthalpy of formation of all elements in their standard state are zero.

Options

A. Both A and R are true and R is the correct explanation of A
B. Both A and R are true and R is not the correct explanation of A
C. A is true but R is false
D. A is false but R is true

Answer

B

Explanation

Combustion of organic compounds is always exothermic. Heat or enthalpy of formation of natural elements in their state is considered to be zero