Hi Garima,
You need to do some form of exercise everyday for the next 4 weeks, a 40minute walk is the best
and watch what you eat, lot of fruits and vegies and your last meal by 7 pm.
Cut out all fried and parathas, only dal ,rice , vegies and meat ( if you are a non-vegetarian ).
You can break down your walk time , do 30 then another 10 after dinner, and drink lots of water
it is quite simple.
Dipti