How many of the given statements are correct:S1: Photoelectric effect can be explained on the basis of wave nature of electromagnetic radiations.S2: An orbital represented by n = 2, l=1 is dumb-bell shaped.S3: dxy orbital has zero probability of finding electrons along X-axis and Y-axis.S4: According to Bohr model, the angular momentum of revolving electron is directly proportional to the atomic number of H-like species bearing the electron.S5: An orbital cannot accommodate more than 2 electrons.S6: All orbitals have directional character.