Answer: Option (A) is the correct answer.
Step-by-step explanation:
Non-metals are the substances which tend to gain electrons from a donor atom in order to attain stability.
For example, atomic number of phosphorous is 15 and its electronic distribution is 2, 8, 5.
As it contains 5 valence electrons electrons therefore, it needs 3 more electrons in order to attain stability.
Hence, when one phosphorous atom combines with another phosphorous atom then it results in sharing of electrons. So, there will be formation a triple bond between the two phosphorous atoms.
Also, there will be one lone pair of electron on each phosphorous atom.
Thus, we can conclude that triple covalent bond would form between two atoms of phosphorus.