Explanation:

- Unicameral (Option 1): A unicameral legislature has only one legislative house or assembly. In India, most states have a unicameral system, where there is only a legislative assembly.

- Bicameral (Option 2): A bicameral legislature consists of two houses, namely the Legislative Assembly and the Legislative Council. Some Indian states like Uttar Pradesh, Bihar, and Karnataka have a bicameral system.

- Either (a) or (b) (Option 3): The Indian Constitution allows states to have either a unicameral or bicameral legislature, depending on their needs and legislation passed by the state.

- Neither (a) nor (b) (Option 4): This option is incorrect as every state in India falls into either option 1 or 2.

Correct Answer: Option 3 - Either (a) or (b)