The species, having bond angles of $120^{\circ }$ is:

- ${\text{PH}}_3$: Pyramidal shape, angle $<109.5^{\circ }$ (approx. $93^{\circ }$ due to Drago's rule).${\text{ClF}}_3$: T-shaped, angles $<90^{\circ }$ due to lone pair repulsions.${\text{NCl}}_3$: Pyramidal, angle $<109.5^{\circ }$ due to one lone pair.${\text{BCl}}_3$: Boron has 3 valence electrons, forms 3 bond pairs. Steric number 3, $s{p}^2$ hybridization, trigonal planar geometry. Ideal bond angle is exactly $120^{\circ }$.