Explanation:

Let’s break it down:

- Employers are on the front line. They handle day-to-day responsibility for their workers’ safety, benefits, and overall well-being.

- The Central Government steps in by making laws and setting broad standards for employee welfare across the country—think minimum wage laws, safety codes, stuff like that.

- State Governments get involved because labor laws often get adapted or enforced at state level—plus, welfare measures can vary from one state to another.

- So, who’s actually responsible? It’s a shared duty. Everyone on that list plays a part.

Option 4: All of the above is the correct answer.