Explanation:

Vande Mataram is a Bengali poem written by Bankim Chandra Chatterjee in 1870s, which he included in his 1882 novel Anandamath. The poem was first sung by Rabindranath Tagore in 1896. The national anthem represents a particular country. A national song is a song written for a country and does not bear that much of a significance as of the national anthem. It is not mandatory to sing the national song.