A covalent molecule $\mathrm{AB}_{3}$ has pyramidal structure. The number of lone pair and bond pair of electrons in the molecule are respectively

• A

  2 and 2
• B

  0 and 4
• C

  3 and 1
• Correct answer
  D

  1 and 3

Solution

The pyramidal structure of covalent molecule $\mathrm{AB}_{3}$ is as:

No. of lone pair $=1$ No. of bond pair $=3$

Hence, the correct answer is option: 'D'.