Explanation:

- Option 1: 600 to 1000

- Incorrect for state assemblies. Such a high number is more in line with large national legislatures, like parliaments of big countries.

- Option 2: 60 to 500

- Correct. The strength of a state legislative assembly in India typically ranges from 60 to 500 members. Some smaller states and Union Territories have exceptions.

- Option 3: 50 to 400

- Incorrect. While plausible for smaller assemblies, it doesn’t account for states with larger populations, which need more representation.

- Option 4: 10 to 100

- Incorrect. This range is too low for most legislative assemblies in larger states.