Let's analyze each sentence:
- (i) Arun and Aparna are here: This is correct because "Arun and Aparna" is a plural subject, so it takes the plural form of the verb "are."
- (ii) Arun and Aparna is here: This is incorrect because "Arun and Aparna" is a plural subject, and it should take the plural verb "are," not "is."
- (iii) Arun's families is here: This is incorrect because "families" is plural, and it should take the plural form of the verb "are." The correct form should be "Arun's families are here."
- (iv) Arun's family is here: This is correct because "family" is singular, so it takes the singular verb "is."
Thus, the grammatically correct sentences are (i) and (iv), making option (B) the correct answer.
Final Answer:
(B) (i) and (iv)