Select the correct passive form of the given sentence.

Rains lashed Delhi and brought the temperature down by a few degrees.

Delhi was lashed by rains and the temperature was brought down by a few degrees.

The correct passive form of the given sentence "Rains lashed Delhi and brought the temperature down by a few degrees" is Delhi was lashed by rains and the temperature was brought down by a few degrees.

The other options are incorrect because:

• Delhi was being lashed by rain and the temperature was being brought down by a few degrees uses the present progressive tense, while the original sentence is in the simple past tense.
• Delhi had been lashed by rain and the temperature had been brought down by a few degrees uses the past perfect tense, while the original sentence is in the simple past tense.
• Delhi is being lashed by rain and the temperature was brought down by a few degrees combines the present continuous tense with the past tense, which is not grammatically correct.