The correct answer is option 3, 500. The question asks for the maximum strength prescribed for State Legislative Assemblies. Each state in India has its own Legislative Assembly, which is responsible for making laws and governing the state. The maximum strength of a State Legislative Assembly is determined by Article 170 of the Constitution of India, and it is set at 500 members. This means that a State Legislative Assembly can have a maximum of 500 members representing different constituencies within the state. It is important to note that while the maximum strength is 500, the actual number of members in each State Legislative Assembly may vary as it is determined based on the population of the state and other factors.