Due to its geography, Sikkim’s industrial sector primarily comprises:

Large-scale heavy industries
Small and medium-scale enterprises
Mining and mineral processing
Petroleum refineries

The correct answer is: b) Small and medium-scale enterprises.

Sikkim is a small state in the Himalayas with a population of just over 700,000 people. The state has a mountainous terrain and a cold climate, which makes it difficult to develop large-scale industries. As a result, Sikkim’s industrial sector is primarily made up of small and medium-scale enterprises. These enterprises are mostly involved in the production of food, beverages, and textiles. They also play a role in the tourism industry.

Option a) is incorrect because Sikkim does not have the infrastructure or resources to support large-scale heavy industries.

Option c) is incorrect because mining and mineral processing are not major industries in Sikkim.

Option d) is incorrect because there are no petroleum refineries in Sikkim.