How can I get 6 pack abs in 3 months?

no, u can't

Don't listen to who say you can't. Download Photoshop.

Kisi bhi construction site pe majddori kar lo

Depends on your body fat percentage. If you are lean already , you can do that. Hit high intensity abs exercise for 20mins everyday. day wise split upper, lower, obliques. also Abs are made in kitchen, so you better watch out your calories. If you are above 25% body fat, it’s not achievable in 3 months, atleast naturally.

Unless you are already at 15-16% bodyfat, you will never get abs in just 3 months.