Assertion (A): Indus valley people knew the art of navigation
Reason (R): Indus Valley seals indicate prevalence of overseas trade.

A

if both (A) and (R) are true and (R) is the correct explanation of (A)

B

if both (A) and (R) are true and (R) is not the correct explanation of (A)

C

if (A) is true but (R) is false

D

if (A) is false but (R) is true