Hello Rani,
I think you are talking about NEET 2018 so a ccording to the NEET 2018 dress code, candidates have been asked to wear light clothes which should not have full sleeves so as to not arouse suspicion. Aspirants should also carefully choose the footwear since shoes are prohibited in the examination centre. The conducting body has made it clear that the candidates should refrain from wearing anything which will create obstruction while they are being inspected.
Good Luck.
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