NDA English Sentence Completion

Acting is the art of performing fictional roles while becoming an officer is real as given in sentence. This rules out option (a). Doing is present continuous verb not suiting the flow of the sentence and highly inappropriate. Deed is an action that is performed intentionally or consciously. Also it is a one time thing, while his run as an officer is a prolonged activity. Record, meaning the sum of the past achievements or performance of a person, organization or thing fits most perfectly here. Hence, option (d).