What is the number of vertices of the regular polygon?
(I) The sum of the angles subtended by the sides at the centre of the polygon 2 $$\pi$$
(II) The number of diagonals of the polygon is 170.

A

if the statement I alone is sufficient to answer the question.

B

if the statement II alone is sufficient to answer the question.

C

if both the statements I and II are sufficient to answer the question but neither statement alone is sufficient

D

it both the statements I and II together are not sufficient to answer the question and additional data is required.