The correct answer is option 4, Supreme Court. The Supreme Court is the final authority in interpreting the Constitution in our legal system. This means that it has the ultimate power to determine the meaning and application of the Constitution`s provisions. The Supreme Court`s role is to ensure that all laws and actions are in compliance with the Constitution, and it has the power of judicial review to declare laws or government actions unconstitutional. This power is crucial for maintaining the balance of power and upholding the principles laid out in the Constitution. The President, Parliament, and Prime Minister have their own powers and roles in the government, but when it comes to interpreting the Constitution, the final authority lies with the Supreme Court.