Eight students i.e four boys - B1, B2, B3 and B4 and four girls - G1, G2, G3 and G4 are sitting around a square in such a way that four students are sitting at the corners and four at the sides. table but not necessarily in the same order. All the students are facing away from the center. G3 is sitting immediate left and immediate right of B3 and G1 respectively. B1 is sitting fifth to the right of G3 and is second to the right of B2. G4 is not siting adjacent to G1 and is opposite to B4. Then who is sitting diagonally opposite to B2?