Which industry supplements the activities of primary and secondary industries?
Tertiary industries supplement the activities of primary and secondary industries.
The industries which provide support services to other industries are known as
(a) Primary industries
(b) Secondary industries
(c) Commercial industries
(d) Tertiary industries
Which of the broad categories of industries covers oil refinery and sugar mills?
(a) Primary
(b) Secondary
(c) Tertiary
(d) None of them