Of the options provided, option 4, Sub-Inspector of Police, is a part of the executive. The executive branch of government is responsible for implementing and enforcing laws. It includes officials who are involved in law enforcement and maintaining public order. A Sub-Inspector of Police is a law enforcement officer who works at the ground level, investigating crimes, maintaining law and order, and ensuring public safety.
On the other hand, options 1 and 2, Member of Legislative Council and Member of Rajya Sabha, respectively, are part of the legislative branch. They are involved in the law-making process by debating and passing laws. Option 3, Chief Justice of Supreme Court, is part of the judiciary, which interprets and applies laws.
Therefore, the correct answer is option 4.