Explanation:

- The Factories Act, 1948 includes several welfare provisions for workers.

- Canteen: The Act mandates canteens in factories with more than 250 workers to provide healthy and subsidized food.

- Crèches: Factories with more than 30 women workers must provide crèche facilities for children.

- First Aid: The Act requires first aid boxes in every factory for immediate treatment of injuries.

- Drinking water: Safe and wholesome drinking water is ensured under the Factories Act, but it is classified as a health provision, not a welfare provision.

Correct Answer: Option 4 – Drinking water