Topic: Group verb,

Best Answer Explained in Below-:

The phrase "Rana’s father wants him to be an engineer --- a doctor" highlights a contrast between two career aspirations. To accurately express this distinction in English, we need to use a phrase that signifies substitution or preference between the two options.

Option A, "instead," would be grammatically incorrect because it lacks a follow-up phrase to clarify what Rana's father's intention is as a replacement. Option C, "expecting," does not fit because it introduces a different meaning related to anticipation rather than preference, while option D, "expect to," does not provide the necessary contrast between the two professions.

The correct choice, "instead of," clearly indicates that Rana's father prefers one option over the other. By saying "Rana’s father wants him to be an engineer instead of a doctor," we explicitly convey that his father favors the career of engineering over that of medicine. This grammatical structure is crucial for creating a logical relationship between the two options, aiding in the clarity and effectiveness of the statement.