Answer : 3. "संविधान"
Explanation :

The Constitution is a set of written rules that are accepted by all people living within a country. The Indian Constitution is the longest in the world. It has been written in 145,000 words. It was composed between the years 1947 and 1950. Originally, it had 395 articles, 8 schedules, and 22 parts and came into effect on 26 January 1950. The articles have now been increased to 448 after many amendments. It is 30 times longer than the American Constitution.