Assertion (A): The principal value of cot⁻¹(3) is 6 .
Reason (R): The domain of cot⁻¹(x) is {-1, 1} .
a) Both assertion (A) and reason (R) are true, and reason (R) is the correct explanation of assertion (A).
b) Both assertion (A) and reason (R) are true, but reason (R) is not the correct explanation of assertion (A).
c) Assertion (A) is true, but reason (R) is false.
d) Assertion (A) is false, but reason (R) is true.