Social & Preventive Medicine

Which of the following statements is true about net protein utilization -

It is the ratio of total nitrogen retained by total N2 intake multiplied by 100

If net protein utilization is high, the amount of protein required in diet is high

It is the ration of energy from protein to total energy in diet

It is amount of one amino acid per gram of a protein divided by the amount of same amino acid per gram of egg protein