Match the items of List I with the items of List-II and select the correct answer:

List-I	List-II
a. Contingency coefficient for any size of contingency table	1. $$\sqrt {\frac{{N - n}}{{N - 1}}} $$
b. Statistical approach to decide size of a sample	2. $$\frac{{{\sigma _p}}}{{\sqrt n }}$$
c. Finite population multiplier	3. $$\sqrt {\frac{{{x^2}}}{{{x^2} + n}}} $$
d. Standard error of mean	4.$$\frac{{{Z^2} \cdot \sigma _p^2}}{{{e^2}}}$$