This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Kidney, Subject name: Pharmacology
Regarding Oxytocin, true statements are 
Select and explain. 
A. Acts on myoepyhelial cells, B. Causes contraction of uterus during labour, C. May cause retention of water, D. All of the above
D: All of the above
Answer: D: All of the above 
Explanation: Refer KDT 6/e p 319 Oxytocin is an octapeptide secreted by the posterior Pituatory along with ADH. Both Oxytocin and ADH are synthesized within the nerve cells bodies in supraoptic and paraventricular nuclei of hypothalamus are transpoed down the axon and stored in the nerve endings within the neuro hypoohysis Oxytocin increases the force and frequency of uterine contractions Oxytocin causes myoepthelium of mammary alveoli and forces milk into the bigger milk sinusoids