Which of the following statements is/are not correct for combination of atomic orbitals? (1) The combining atomic orbitals must have the same or nearly the same energy. (2) Greater the extent of overlap, the greater will be the electron density between the nuclei of a molecular orbital. (3) \(2p_{z}\) orbital of one atom can combine with either of \(2p_{x}, 2p_{y}\) or \(2p_{z}\) orbital of other atom as these orbitals have same energy.