The correct answer is: A. Half of concerned legislative assembly.
The maximum strength of a state legislative council is half of the total number of members in the state legislative assembly. This is as per Article 171 of the Constitution of India.
The legislative council is a permanent body and one-third of its members retire every second year. The members of the legislative council are elected by an electoral college consisting of members of the legislative assembly, members of the panchayats and municipalities, and registered graduates of the state.
The legislative council has the power to make laws on all subjects except those that are reserved for the Union Parliament. It also has the power to discuss and pass resolutions on any matter of public importance.
The legislative council is a valuable institution in the Indian federal system. It provides a forum for the representation of the interests of different sections of society and helps to ensure that the laws passed by the state legislature are in the best interests of the people.
The other options are incorrect because they do not reflect the maximum strength of the state legislative council as per the Constitution of India.