Assertion : Detergents with straight chain of hydrocarbons are preferred over branched chain.
Reason : Detergents with brached chain hydrocarbon part are expensive.
A. If both assertion and reason are true and reason is the correct explanation of assertion .
B. If both assertion and reason are true but reason is not the correct explanation of assertion .
C. If assertion is true but reason is false.
D. If both assertion and reason are false.