Which of the following statements are correct regarding hybridization?

The main features of hybridization are as under(t) The number of hybrid orbitals is equal to the number of the atomic orbitals that get hybridized.(ii) The hybridized orbitals are always equivalent in energy and shape.(iii) The hybrid orbitals are more effective in forming stable bonds than the pure atomic orbitals.(iv) These hybrid orbitals are directed in space in some preferred direction to have minimum repulsion between electron pairs and thus a stable arrangement. Therefore, the type of hybridization indicates the geometry of the molecules.