Correct Answer: (B) Both Assertion (A) and Reason (R) are true, but Reason (R) is not the correct explanation of Assertion (A).

Step 1 - Check the Assertion:

True. A very large share of the Indian workforce still depends on agriculture for its livelihood, even though the share of agriculture in national income has fallen.

Step 2 - Check the Reason:

True. Over 90 per cent of work in India is in the unorganised or informal sector, where there is no job security, no pension and no protection of labour laws.

Step 3 - Check the link:

Lack of secure jobs is a separate fact about the nature of employment in India. It does not explain why India remains largely agricultural.

Hence, option (B) is correct.