Which of the following is NOT a major occupational category according…

The correct answer is Option (4) → Non-workers

Option (1) Cultivators — An occupational category (Incorrect). The first of the four occupational categories of the census.

Option (2) Agricultural Labourers — An occupational category (Incorrect). The second of the four categories.

Option (3) Household Industrial Workers — An occupational category (Incorrect). The third of the four categories; the fourth is other workers.

Option (4) Non-workers — Not an occupational category (Correct). Non-workers are people who do no economic work. They are one of the three groups by economic status (main workers, marginal workers and non-workers), so they cannot be a category of occupation.