Answer : 2. "Article 54"
Explanation :

Article 52 to 78 in Part V of the Constitution deal with the Union Executive. The union executive consists of the president, the vice president, the prime minister, the council of ministers, and the Attorney General of India. The president (article 52) is the head of the Indian state. He is head of all Supreme Commander of all the armed forces. He is the first citizen of the country and acts as the symbol of the integrity and solidarity of the nation. Article 38-State to secure a social order for the promotion of the welfare of the people. Article 36- Definition of State which is given in Article 12 Article 56 -Term of office of President. (5 Years)