Sectional modulus of a pipe

Question

 A pipe of external diameter 3 cm and internal diameter 2 cm and of length 4 m is supported

 at its ends. Its carries a point load of 65 N at its centre. The sectional modulus of the pipe will be

  (a)65\pi /64cm³              (b)65\pi /32cm³

   (c)65\pi /96cm³             (d)65\pi /128cm³