​As of October 2022, fire altars are primarily found in which of the following Harappan cities?​

Correct option is D

Fire altars were primarily found in the Harappan cities of Kalibangan and Lothal.

• Kalibangan: Located in Rajasthan, Kalibangan is known for its unique fire altars, which were found inside some houses. The altars suggest fire worship or worship of Agni. Kalibangan is also known for having the world's earliest known ploughed field. 
• Rakhigarhi constitutes one of the only two cities of the Harappan Era (6th millennium–1900 BC) situated within India's current political boundary, the other being Dholavira in Gujarat. The exploration around this site has clearly identified seven archaeological mounds spread over an area of approximately 350 ha.
• Banawali is an archaeological site belonging to the Indus Valley civilization period in Fatehabad district, Haryana, India and is located about 120 km northeast of Kalibangan and 16 km from Fatehabad. Banawali, which is earlier called Vanavali, is on the left banks of dried up Sarasvati River.
• The name Mohenjo-daro is reputed to signify “the mound of the dead.” The archaeological importance of the site was first recognized in 1922, one year after the discovery of Harappa. Subsequent excavations revealed that the mounds contain the remains of what was once the largest city of the Indus civilization.