Match the following columns

Column I	Column II
a. The coefficient of correlation	1. Spearman
b. If r = 0.3, r2 will be	2. Standard error
c. The probable error of correlation coefficient is 0.6745 of	3. Varies between ± 1
d. The rank correlation coefficient was developed by	4. 0.09

A. a-1, b-2, c-3, d-4

B. a-3, b-4, c-2, d-1

C. a-4, b-3, c-2, d-1

D. a-2, b-4, c-1, d-3

Answer: Option B