The correlation coefficient between $x$ and $y$ is from the following data is $\Sigma x = 40\: \: \Sigma y=50\: \: \Sigma xy = 220\: \: \Sigma x^2=200\: \: \Sigma y^2 = 262\: \: n=10$

Question

$\begin {array} {1 1} (A)\;0.89 & \quad (B)\;0.76 \\ (C)\;0.91 & \quad (D)\;0.98 \end {array}$