Find out the correct answer out of the options given against each questions : If a random sample `x_1, x_2,......x_n`, is drawn from `N(mu, sigma^2)`, then an estimator obtained by the method of moments for the `sigma^2` is

Options

A. `ns^2`
B. `(n-1)s^2`
C. `s^2`
D. `(ns^2)/(n-1)` where `s^2 = 1/n sum_(i = 1)^n (X_i - barx)^2` and `barx = 1/n sum_(i=1)^n x_i`