Chandraprabha Wildlife Sanctuary is situated in which of the following District?

A wildlife sanctuary's “location” in Indian administrative geography is stated as the district that currently governs it — and district boundaries in Uttar Pradesh have been redrawn over time by carving new districts out of older, larger ones, so an area's district can change even though its physical location never moves.

Chandraprabha Wildlife Sanctuary sits on the Kaimur (Vindhyan) plateau in southeastern Uttar Pradesh. Until 1997 this area fell within the undivided Varanasi district, but in 1997 the state government carved out Chandauli as a new, separate district from Varanasi's territory — and Chandraprabha's forest range now falls administratively under Chandauli district, well before the 2013 exam year in this question.

• Lakhimpur Kheri lies far to the north, in the Terai belt near the Nepal border, and is associated with Dudhwa National Park, not with this sanctuary.

• Lucknow is Uttar Pradesh's state capital in the central part of the state and does not host a wildlife sanctuary by this name.

• Varanasi was this area's parent district before the 1997 split; today the sanctuary falls under the newer district carved out of it, not under Varanasi itself.

So Chandauli is the district in which Chandraprabha Wildlife Sanctuary is currently situated.