PPSC Past Paper Assistant Director Planning & Development Department-2019 Solved MCQs, Everyday Science MCQs, PPSC Solved Past Papers MCQsBeri-Beri is a deficiency disease caused by an unbalanced diet low in?A. Protein B. Carbohydrates C. Vitamin B D. Vitamin A & B Who discovered that plants have Life?A firm buys goods on credit, which document does the firm use to record this?
