AI-generated practice question — model-generated for extra practice, not a previous-year CBSE board question.
(a) On the basis of nature of activity: Primary, Secondary, and Tertiary sectors.
(b) On the basis of employment conditions: Organised and Unorganised sectors.
Source: Sectors of the Indian Economy, Chapter 2 (Let's Recall)
This is a direct recall question. The passage explicitly states that "primary, secondary, tertiary" uses nature of activity as the criterion, while "organised/unorganised" uses employment conditions. Examiners expect both parts answered precisely with the correct sector names. No elaboration needed for 1 mark.