Jeans may be allowed as last year many girls wore ..it would be better if u wear any light colour kurti

Yess passport size photo is needed in the examination hall as well as in your admit card 

Yes, its allowed but as per the guidelines of CBSE, candidates appearing foe exam should wear light coloured and loose clothes. Also, there should not be any metallic accessory attached to the clothes. You should rather wear loose pants and kurta, make sure its comfortable. Go through NEET 2019 Exam guideline to know things to do and avoid on exam day.

Yes, yiu need to carry two passport size photos.

The following dimensions will follow by the medical aspirants :-

• Photo Size: 10 Kb to 100 Kb
• Photo Dimensions: Size of photo: 2 x 2 inch, 35 x 45 mm or 35 x 35 mm (5 x 5 cm, 3.5 x 4.5 cm, 3.5 x 3.5 cm)
• Photo Background: White
• Details on NEET Photo: Photograph having a white background with the clearly mentioned name of the candidate along with the date of taking photograph, must be used.