Which one of the following is the largest (areawise) Lok Sabha constituency?

The largest Lok Sabha constituency by area is Ladakh (option 2). Official and widely used references list Ladakh as the biggest parliamentary constituency in India, covering approximately 173,266 square kilometres, which is substantially larger than other mainland constituencies and makes it the country’s most extensive single-member parliamentary seat by geographic expanse [1]. Multiple independent sources and constituency summaries corroborate this ranking, consistently placing Ladakh well ahead of large western seats such as Kachchh (Kutch) or desert/ridge constituencies in Rajasthan and Arunachal—confirming Ladakh’s status as the areawise largest Lok Sabha constituency.

Sources

1. [1] https://en.wikipedia.org/wiki/Ladakh_Lok_Sabha_constituency