Out of 100 students,two sections of 40 and 60 are formed.If you and your friend are among the 100 students,what is the probability that,you both enter the different sections?

Question

$\begin{array}{1 1}(A)\;\large\frac{16}{33}\\(B)\;\large\frac{17}{33}\\(C)\;\large\frac{36}{165}\\(D)\;\large\frac{56}{165}\end{array} $