I m 20 years old female i want to lose 25 kg in 3 months. i can't go gym for this and i m a university student have to sit down long please guide me?

You mean 13 months: Helpful weight loss diets have natural foods that take time to chew but contain few calories. Examples include carrots, celery, and leafy lettuce (little or no salad dressing). When shopping for fruits, buy small ones no bigger than a tennis ball, because fruits have sugar. Drinks without calories include water and green tea. A calorie is a calorie, but surely avoid sugar & simple starch calories.