Active-to-passive voice (reporting advice with infinitive): Convert the sentence to passive, keeping the negative infinitive intact. Source sentence: The doctor advised the patient not to eat rice. Instruction: Choose the grammatically correct passive-voice option.

Given data

• Verb: advise + object + to-infinitive (negative).
• Active: The doctor advised the patient not to eat rice.

Concept / Approach
Passive keeps the infinitive phrase with the object now as subject; tense stays simple past.

Step-by-step transformation
Object becomes subject: the patient → The patientAuxiliary (past): wasPast participle: advisedRetain negative infinitive: not to eat riceAgent: by the doctorFinal passive: The patient was advised by the doctor not to eat rice.

Eliminate wrong options
A: Correct tense and structure. ✅B: Changes structure to a that-clause; less direct and not required. ❌C: Ungrammatical and repetitive. ❌D: Uses present perfect has been advised; changes tense. ❌

Final Answer
The patient was advised by the doctor not to eat rice.