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(B) The centripetal acceleration $a_c$ for a body in uniform circular motion is given by the formula $a_c = R \omega^2$.Here,$R$ is the radius of the

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$4 \pi^2 n^2 R$

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(B) The centripetal acceleration $a_c$ for a body in uniform circular motion is given by the formula $a_c = R \omega^2$.Here,$R$ is the radius of the circular path and $\omega$ is the angular velocity.The relationship between angular velocity $\omega$ and frequency $n$ is $\omega = 2 \pi n$.Substituting this value into the acceleration formula:$a_c = R (2 \pi n)^2$$a_c = R (4 \pi^2 n^2)$$a_c = 4 \pi^2 n^2 R$.Therefore,the correct option is $B$.

$A$ body performing uniform circular motion of radius $R$ has frequency $n$. Its centripetal acceleration is

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