Which one of the following practices will NOT conserve LPG in your kitchen.
(a) Soaking the dal for some time before cooking it.
(b) Cooking food in a pressure cooker.
(c) Keeping the vegetables chopped before lighting the gas for cooking.
(d) Cooking food in an open pan kept on low flame.
NCERT Solutions for Class 8th Social Science Resourse and Development Chapter 3 Exercise 2(iv)