Hi Preeti 

As per NEET 2019 dress code 

You can wear light colour clothes with half sleeves not having big buttons/ embroidery/ flowers etc. 

Light colour Trousers and salwars are allowed.

Also you can only wear slippers and sandals. Shoes are not allowed. 

Shoes, full sleeves T-shirts or shirts , jewellery or ornaments, watches , sun glasses, big rubber bands, hair clips , saree , bangles and caps are not Allowed .

All The Best!!

Hello!

I'm assuming you're talking about NEET, and even if you're specifying some other competitive exam, a black trouser without any zip or pockets would be a good option, but black leggings would be a safer option. If you think you have any more queries about dress code, please comment them below this answer.

Good luck!