Two Statements S1 and S2 are given below followed by a Question:

S1: Floor 3 of a building is painted a colour different from floor 2.

S2: Every floor of the building is painted either blue or green, floor 2 is painted green, and no two consecutive floors share the same colour.

Question: What colour is floor 3 painted?

Which one of the following is correct in respect of the above Statements and the Question?