(A) The formation of `SO_(3)` by contact process is an example of heterogeneous catalysis
(R): The reactants and product are in different phase in the formation of `SO_(3)` by contact process 

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

C