Please help me with my economics problem. I don't know how to answer it.

Consider the regression equation Yi=l30+l31XJ+Ui A where E[U,-| X1] = 0 for all i = 1. ..., n. Let 3 1 be the OLS estimator for B 1. Which statement is the most irrelevant to the consistency of 1 ? Hint: see Lecture Note 2 (p.25p.28) \"a A ' When n is large, the estimator 1 is near the population parameter 3 1 A b. A A p - Consistency of 8 1 is mathematically written as 3 1 *3 1 "c A ' ' VHS 1] is inversely proportional to the sample size n. A '1 RMSE is close to zero when the sample size n is large