Dear Nimisha, hope this helps...

Photo Size should be between 10 Kb to 100 Kb
Photograph Size Photo Dimension allowed Size of photo: 35 x 45 mm (5 x 5 cm, 3.5 x 4.5 cm, 3.5 x 3.5 cm) 
Photograph Background should be White andand not use any other background 
Details on Photo are to be followed. Photograph having a white background with the clearly mentioned name of the candidate along with the date of taking photograph below must be used.
Photo must be taken on or after 1 Oct 2018.Photo should not have cap or goggles. Spectacles are allowed if used regularly.