salman: Your knowledge is wrong.Jana Gana Mana is the national anthem. Vande Mataram is national song. The national anthem was penned in bengali but the version being used presently is the (sanskriticed) hindi version. Did it sound like Bengali to you? Sad you missed the ubiquitous bengali 'o'. ;)

Btw, do give a search on who had the audacity to go to erstwhile east bengal and announce that "Urdu and only Urdu' can become their national language. The whole episode ended up in the fiasco of 16th Dec 1971. Chk it out.