This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Child psychiatry, Subject name: Psychiatry
Pagophagia involves eating 
Select and explain. 
A. Ice, B. Sand, C. Clay, D. Salt
A: Ice
Answer: A: Ice 
Explanation: Pica is defined as persistent eating of nonnutritive substances.It is identified only when medical problems such as intestinal obstruation, intestinal infections or poisoning arises (lead). among adults, ceain foods of pica, including geophagia (clay) and amylophagia (starch), have been repoed in pregnant women. Ref: Synopsis of Psychiatry, 11e, pg 1206