Select the correct passive form of the given sentence.

Ravish likes chocolate.

Chocolate is liked by Ravish.

The correct passive form of the given sentence is Chocolate is liked by Ravish.

The active voice of the sentence is Ravish likes chocolate. This sentence is in the simple present tense, which is used to describe an action that happens regularly or always happens. The passive voice of the sentence is formed by putting the subject of the active sentence after the verb "to be" and the past participle of the main verb. In this case, the subject of the active sentence is "chocolate" and the main verb is "like." The past participle of "like" is "liked." So, the passive form of the sentence is Chocolate is liked by Ravish.

The other options are incorrect because:

• Chocolate was liked by Ravish. is in the simple past tense, while the original sentence is in the simple present tense.
• Chocolate is being liked by Ravish. is in the present progressive tense, which is used to describe an action that is happening now but is not finished. The action of liking chocolate is something that happens regularly, so the present progressive tense is not appropriate.
• Chocolate likes Ravish. is in the active voice.
• Chocolate liked by Ravish. is grammatically incorrect. The verb "to be" is missing.