Which of the following is\are true?
I. -1≤B≤1; B=beta
II. -1≤COV≤1; COV=Coefficient of variation
III. -1sps1; p=Correlation coefficient
IV. -1s0s1; o=Standard deviation
Select one:
a. I, II, III & IV
b. II, III & IV only
c. Ill only
d. I & II, III only
e. Il & IV only
