Which of the following do/does NOT come under state list of 7th schedule of the Indian constitution?

Regulation of labour and safety in mines and oilfields

The correct answer is Option 3 - Regulation of labour and safety in mines and oilfields

Regulation of labour and safety in mines and oilfields comes under the concurrent list.

The Seventh Schedule divides legislative powers between the Union and the States by listing subjects under three categories:
Union List (List I): Contains 100 subjects (originally 97) over which the Union Parliament has exclusive power to make laws. These include national defense, foreign affairs, currency, communication, railways, etc.
State List (List II): Includes 61 subjects (originally 66) for which the State Legislatures have the power to make laws. These encompass public order, police, agriculture, local government, etc.
Concurrent List (List III): Lists 52 subjects (originally 47) where both the Union Parliament and the State Legislatures can make laws. However, in case of a conflict, the Union law prevails. Examples include education, forests, electricity, etc.