Minimum Digestible Crude Protein (DCP) and Total Digestible Nutrients (TDN) in concentrates for milk production are

Correct option is D

Milk production requires higher protein and energy intake.
Concentrate mixtures supplement roughages in dairy animals.
DCP supports milk synthesis.
TDN supplies energy for production and maintenance.
Standard recommendation is 16% DCP and 72% TDN.
Hence, option (d) is correct.