Explanation
All enzymes are proteins but all proteins are not enzymes, as enzymes are defined and understood as biopolymers which catalyzes biochemical reaction.
Whereas though proteins have catalytic capabilities too but they do not function as enzymes.
Enzymes are bio catalysts having an active site though they have a definite shape which is required for specific molecules to bind with the enzyme in order to attain a stable configuration.
Final Answer
Hence, option B: If both (A) and (R) are true, but (R) is not the correct explanation of (A) is the correct option.
