Match the following columns

Column I	Column II
a. If $$\frac{{\left( {\text{A}} \right) \times \left( {\text{B}} \right)}}{{\text{N}}} = {\text{AB,}}$$    the attributies are called	1. + 1
b. The Yule's coefficient of association varies between	2. Independent
c. Index numbers are	3. 1764
d. Historically the first index was constructed in	4. Specialised averages

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-1, c-4, d-3

Answer: Option D