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.
(i) Mark the correct option from the following names marked in A, B and C.

(1)