Given below are Assertion (A) and Reason (R), consider them and select the correct answer:
Assertion (A) A categorical syllogism commits a fallacy of four terms if more than three terms are used.
Reason (R) In a standard form of categorical syllogism, there are three and only three terms occuring twice each in the same meaning.

A. A and R both are true and R is not the correct explanation of A

B. A and R both are true and R is the correct explanation of A

C. A is true and R is false

D. A and R both are false

Answer: Option B