According to BIS (Bureau of Indian Standards) (2007) specifications, the minimum metabolizable energy requirement for grower ration is

Correct option is B

BIS (2007) provides standards for poultry feed formulation in India.
Grower birds require adequate metabolizable energy for body growth.
Very low energy affects growth rate and feed efficiency.
As per BIS, grower ration should contain about 2500 kcal/kg ME.
Higher energy levels are recommended only for broilers.
Therefore, 2500 kcal/kg is the correct answer.