Identify the centres of Harappan civilisation where 'specialised drills' have been found.

Chanhudaro, Lothal

The correct answer is Option (2) → Chanhudaro, Lothal

Specialized drills have been found at the archaeological sites of Lothal and Chanhudaro, which were both important centers of the Harappan civilization.

- At sites such as Dholavira and Lothal (Gujarat), the entire settlement was fortified, and sections within the town were also separated by walls.
- Specialised drills have been found at Lothal, Chanhudaro, and more recently at Dholavira too.
- Lothal was also a source of Carnelian for the people of Harappan culture.
- Fire altar, a structure which was assigned ritual significance by the archaeologist was found at Kalibangan and Lothal.