Concept:When converting a direct question to indirect speech, the reporting verb changes, the tense shifts back, pronouns adjust, and time expressions update.
Explanation:The direct question starts with "Did you ask..." which becomes "if he had asked" in indirect speech. "Did" (past simple) changes to "had asked" (past perfect).
Pronoun "you" changes to "he" (the contractor).
"when we are going to receive" changes to "when they were going to receive" – "we" becomes "they" and "are going" (present) becomes "were going" (past).
"that has been pending for the last three months" changes to "that had been pending for the previous three months" – "has been" (present perfect) becomes "had been" (past perfect), and "last" becomes "previous".
The sentence becomes a statement, so no question mark or quotation marks are used.
Option D matches all these changes correctly.
Other options have errors in tense or word order.
Answer:D. The labourers asked the contractor if he had asked the manager when they were going to receive their remuneration that had been pending for the previous three months.