Question

Which hormone, released from the posterior pituitary gland in response to suckling or the tactile stimulus of milking, causes contraction of the myoepithelial cells around the alveoli and thereby triggers the milk ejection (let-down) reflex in dairy animals?

A Prolactin
B Progesterone
C Oxytocin
D Follicle Stimulating Hormone (FSH)
E Luteinizing Hormone (LH)
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