Direct Method to Calculate Standard Deviation

Q. Match the following :
List I
1. Correlation in Bivariable Frequency table.
2. Probable error and co-efficient correlation.
3. Rank correlation.
4. Karl pearson's co-efficient of correlation.
List II
a) $\frac{\Sigma fdxdy-\frac{\Sigma fdx\Sigma fdy}{N}}{\sqrt{\Sigma fd{x}^2-\frac{(\Sigma fdx{)}^2}{N}}\sqrt{\Sigma fd{y}^2-\frac{(\Sigma fdy{)}^2}{N}}}$
b) $r=0.6745\frac{{-r}^2}{\sqrt{N}}$
c) $r=1-\frac{6\Sigma d^2}{n(n^2-1)}$
d) $r=\frac{\Sigma xy}{N\sigma x\sigma y}$
Codes :
1 2 3 4

1. b d a b
2. a b c d
3. d b c a
4. b a c d