All are TRUE regarding Net Protein Utilisation, except –

Net protein utilization NPU is the percentage of ingested protein retained inside the body (not an increase in weight) It is a product of digestibility coefficient and biological value divided by 100. The protein requirement varies with the NPU of dietary proteins. If the NPU is low, the protein requirement is high, and vice versa. NPU of protein for Indian diets varies between 50 and 80. NPU is 100 for egg (best protein) and about 75 for milk NPU = Retained nitrogen / Nitrogen of food x 100 NPU = Digestibility coefficient x Biological value / 100 About option 'a' Increase in weight per unit weight of protein consumed is known as protein efficiency ratio.