Indian Polity · Polity

With reference to the oath or affirmation taken by the President of India under the Constitution, consider the following statements: I. The President undertakes to faithfully discharge the functions of the office. II. The oath includes a commitment to uphold and safeguard the Constitution and the law. III. The President pledges to dedicate himself/herself to the service and welfare of the people of India. IV. The oath explicitly requires the President to promote harmony and the spirit of common brotherhood among citizens. Which of the statements given above are explicitly mentioned in the Presidential oath?