As a Rule, the Mandibular First Premolars Are Always Smaller

As a rule, the mandibular first premolars are always smaller than the mandibular second premolars. The most striking identifying feature of the mandibular first premolar is the mesiolingual developmental groove.

A) Both statements are true.
B) The first statement is true; the second is false.
C) The first statement is false; the second is true.
D) Both statements are false.