Identify the economic activities in the following case and classify them into Primary, Secondary and Tertiary industies.
(a) Mohan, a farmer producing wheat
(b) Raj, the owner of a cotton textile firm.
© Ramesh, is working as a peon in an oil refinaty.
(d) Krishna, is running her advertisement agency.
(a) Farmer—Business—Primary industry.
(b) Owner of a cotton textile firm—Business secondary industry.
© Peon—Employment—Secondary industry.
(d) Advertisement agency—Profession—Tertiary industry