The correct Active/Passive form of the given sentence is:

☀ A. R. Rehman has composed the Oscar-winning song ‘Jai Ho’.

 Explanation for other options:

☀ A. R. Rehman composed the Oscar-winning song ‘Jai Ho’. This option is also in the active voice, and it is grammatically correct. It conveys the same meaning as the original sentence.

☀ A. R. Rehman had composed the Oscar-winning song ‘Jai Ho’. This option changes the verb tense to past perfect ("had composed"), which suggests an action completed before a certain point in the past. The original sentence is in the present perfect tense, so the correct form should be "A. R. Rehman has composed the Oscar-winning song ‘Jai Ho’."

☀ A. R. Rehman has been composing the Oscar-winning song ‘Jai Ho’. This option uses the present perfect continuous tense ("has been composing"), which suggests an ongoing action that started in the past and continues into the present. The original sentence is in the present perfect tense, not the present perfect continuous tense, so the correct form should be "A. R. Rehman has composed the Oscar-winning song ‘Jai Ho’."