Select the correct passive form of the given sentence.

I use jaggery to sweeten my tea in winters.

Jaggery is used by me to sweeten my tea in winters.

The correct passive form of the sentence "I use jaggery to sweeten my tea in winters" is Jaggery is used by me to sweeten my tea in winters.

The other options are incorrect because:

• Jaggery is being used by me to sweeten my tea in winters uses the present continuous tense, while the original sentence is in the simple present tense.
• I have been using jaggery to sweeten my tea in winters uses the present perfect tense, while the original sentence is in the simple present tense.
• In winters jaggery was used by me to sweeten my tea uses the past tense, while the original sentence is in the simple present tense.