my baby 8 month old he do not sit properly till now

A. Hello good morning !! Babies generally sit around 6-8 months but few take 8-9 + months don't worry. Make baby sit on your lap with support or with support of pillow on the bed or to the wall in your presence regularly for 5-10 minutes ,this helps in sitting without support. Give home made cerelac with ghee,ragi malt or porridge,dal kichdi ,curd ,fruit and vegetable purie or mash to meet the nutritional requirement