Given below are two statements, one labelled as Assertion (A) and the other labelled as Reason (R). Read the statements and choose the correct answer:
Assertion (A) Article 1 described India as a 'Union of States.'
Reason (R) The term 'Union of States' was used to curb sub-nationalism and strengthening unity and integrity of the country.

A. Both A and R are true and R is the correct explanation of A

B. Both A and R are true, but 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: Option A