A class has 30 students .We have to form a team of the students including atleast two students and also excluding atleast two students.The number of ways of forming the team is

Question

$\begin{array}{1 1}(A)\;2^n-2n\\(B)\;2^n-2n-2\\(C)\;2^n-2n-4\\(D)\;\text{None of these}\end{array} $