For a transfer function H(s)= P(s)/Q(s), where P(s) and Q(s) are polynomials in s. Then

A)     The degree of P(s) is always greater than the degree of Q(s)

B)      The degree of P(s) and  Q(s) are same

C)      The degree of P(s) is independent of the  degree of Q(s)

D)     The maximum degree of P(s) and  Q(s) differ at most by one