A. development of secondary sexual characteristics
B. on set of heat period
C. milk let – down after parturition
D. development of udder
Correct Answer: Option B
B. on set of heat period
A. development of secondary sexual characteristics
B. on set of heat period
C. milk let – down after parturition
D. development of udder
Correct Answer: Option B
B. on set of heat period
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