(A) : A unitless physical quantity must be dimensionless. (R) : A pure number is always dimensionless.

(A) : A unitless physical quantity must be dimensionless. (R) : A pur

1.	(A) : A unitless physical quantity must be dimensionless. (R) : A pure number is always dimensionless.
Answer» Both (A) and (R) are true and (R) is the CORRECT explanation of (A) Both (A) and (R) are true and (R) is not the correct explanation of (A) (A) is true but (R) is false Both (A) and (R) are false Answer :B