Approximate percentage of scores that fall within $\pm \sigma$ (standard deviation) of the mean in a normal distribution is

(A) 34

(B) 68

(C) 95

(D) 99

Approximate percentage of scores that fall within $\pm \sigma$ (standard deviation) of the mean in a normal distribution is

(A) 34

(B) 68

(C) 95

(D) 99

127