Form the possessive case of the nouns in apposition given in the bracket:
__________________________ Car is bright red in colour. (Sharad, my best friend).
A. Sharad’s my best friend
B. Sharad, my best friend’s
C. Sharad, my best friend
D. Sharad’s my best friend’s

Hint: Possessive case of noun is used with nouns referring to people, groups of people, countries, and animals. It shows a relationship of belonging between one thing and another.

Complete step by step answer:
Possessive nouns are nouns that show ownership or possession. Normally these words would be a singular or plural noun, but in the possessive form they are used as adjectives to modify another a noun or pronoun.
Option A) Sharad’s my best friend: this is an incorrect answer because it does not follow the rule i.e. the possessive case of such nouns in apposition is formed by suffixing apostrophe + S to the second noun. This case does not follow in this option. Thus, this is an incorrect answer. On substituting it is not making sense and adding no value to the sentence.
Option B) Sharad, my best friend’s: In the given sentence, the first noun is Sharad. The second noun phrase is - my best friend. Both refer to the same person and hence the nouns are in apposition. Its possessive case is formed by suffixing apostrophe + S to the last word in the second noun phrase i.e friend. Thus, this is the correct answer.
Option C) Sharad, my best friend: is an incorrect answer because possessive noun rule does not shown in this option i.e. the possessive case of such nouns in apposition is formed by suffixing apostrophe + S to the second noun. This case does not follow in this option. Thus, this is an incorrect answer. ‘My best friend car’ does not make sense.
Option D) Sharad’s my best friend’s: is an incorrect answer because possessive noun rule is not shown in this option i.e. the first noun Sharad’s has to be without apostrophe (instead of Sharad’s it should be Sharad). This case does not follow in this option. Thus, this is an incorrect answer.

Note:
To form the possessive noun, add apostrophe + s to the noun. If the noun is plural, or already ends in s, just add an apostrophe after the s. When two nouns/ noun phrases are next to each other and refer to the same person, they are said to be in apposition. The second noun/noun phrase describes the first noun/noun phrase.