please provide answer to the questions.

Which statement about the so called "Minimum Variance Unbiased Estimator" is NOT true? (Pick one choice only and be careful: the question asks which statement is NOT true.) The unbiased estimator that has the highest amount of variability among all unbiased estimators for a parameter is called the Minimum Variance Unbiased estimator (MVUB) for that parameter. The unbiased estimator that has the least amount of variability among all unbiased estimators for a parameter is called the Minimum Variance Unbiased estimator (MVUB) for that parameter. It is known that, for normal populations, the MVUB's for the mean and the variance are X-bar and S^2, respectively