Read the passage carefully and answer the following questions from (i) to (v):
The nature of the covalent bond enables carbon to form a large number of compounds. Carbon has the unique ability to form bonds with other atoms of carbon, giving rise to large molecules. Since carbon has a valency of four, it is capable of bonding with four other atoms of carbon or atoms of some other monovalent element.
(v) Carbon forms four covalent bonds by sharing its four valence electrons with four univalent atoms, e.g., hydrogen. After the formation of four bonds, carbon attains the electronic configuration of:
(2)