The option that describes a molecule with one lone pair and three bonding pairs of electrons is:
A. angled
This corresponds to a molecule with a trigonal pyramidal geometry, which has one lone pair and three bonds (like ammonia, NH₃). An angled shape is also characteristic of a bent molecular geometry that can arise from two bonded atoms and two lone pairs (like water, H₂O). However, with three bonding pairs and one lone pair, the molecule would have an overall "angled" appearance.
So, the correct answer is A. angled.