According to VSEPR theory:

Explanation

Option D is correct.The VSEPR theory is a model that describes the shape of molecules based on the repulsion between electron pairs. The theory assumes that the valence electrons of a molecule are arranged in space in a way that minimizes the repulsion between them. The VSEPR theory assumes that each atom in a molecule will achieve a geometry that minimizes the repulsion between electrons in the valence shell of that atom. Let's try to understand with example PF5. Repulsion between the five pairs of valence electrons on the phosphorus atom in PF5 can be minimized by distributing these electrons toward the corners of a trigonal bipyramid. Three of the positions in a trigonal bipyramid are labeled equatorial because they lie along the equator of the molecule. The other two are axial because they lie along an axis perpendicular to the equatorial plane. The angle between the three equatorial positions is 120 ∘ while the angle between an axial and an equatorial position is 90 ° Pair of electrons attract each other in valence shell, according to the valence shell electron pair repulsion (VSEPR) theory. The VSEPR theory is a model that explains the shapes of molecules in terms of the repulsion between electron pairs in the valence shell of the central atom. The theory assumes that electron pairs repel each other, and that the shape of a molecule minimizes the repulsion between the electron pairs.