Well, consider that you are on the other side of the table and there enters a candidate who is wearing unironed clothes, has not shaved and had taken the last haircut probably before the Mains examination! Surely, this candidate would not give a very pleasing impression. On the flip side you also don’t have to dress up like James Bond wearing a custom-made Tim Ford single breasted suit! Wearing neat, well ironed clothes and clean polished shoes is what is expected. If one can wear a necktie, it will be good. For girl candidates, wearing a Saree or Suit or traditional dress of the State is a norm.