Solution:
According to the given information :
Republic Day is celebrated on 26 January at the starting of the Year in India.
Then Independence Day is celebrated on 15 August in India.
After that, Gandhi Jayanti is celebrated on 2 October in India.
After that, Children's day is celebrated on 14 November in India.
And in last, Catholic Christmas is celebrated on 25 December in India.
So, the arrangement of the following festivals in the order of the occurrence in India will be Republic Day - Independence Day - Gandhi Jayanti - Children's day - Catholic Christmas.
Hence, the correct answer is "2, 5, 4, 3, 1".