The minimum density (g/cc) of corrugated and semi-corrugated asbestos cement sheets considered acceptable for construction purposes by the Indian standard is:

Correct option is D

As per the Indian Standard IS 459 (Asbestos Cement Corrugated and Semi-Corrugated Sheets):
The minimum density specified for corrugated and semi-corrugated asbestos cement sheets used for construction purposes is 1.4 g/cc.
This density ensures adequate strength, durability, and weather resistance required for roofing and cladding applications.