The correct option is C (A) is true and (R) is false
Given number=299261
=293×3×3×7×7×7=2933×73
9261=33×73 is not of the form 2n×5m.
Hence, Assertion is true but the Reason is false because if the denominator of the rational number can be expressed in the form 2n×5m, where n and m are non-negative integers, then rational number has a decimal expansion, which is terminating.