A particle of mass $M$is moving in a circle of fixed radius $R$ in such a way that its centripetal acceleration at time $t$ is given by $n^2 R t^2$ where $n$ is a constant. The power delivered to the particle by the force acting on it, is:

Question

$\begin{array}{1 1}(1) M n^2 R^2 t \\ (2) M n R^2 t \\(3) M n R^2 t^2\\(4)\frac{1}{2} M n^2 R^2 t^2 \end{array}$