Specialised centres for the production of shell objects in Harappan civilisation were found in _______________:

(1) Chanhudaro and Lothal
(2) Nageshwar and Balakot
(3) Cholistan and Banawali
(4) Kalibangan and Nageshwar

2

Nageshwar and Balakot, located near the coast, were specialized centers for crafting shell objects like bangles, ladles, and inlays, which were then distributed to other settlements.