This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Pediatrics
Which of the following is not true about Rumination disorder ? 
Select and explain. 
A. Failure to thrive, B. Appears between 3–5 years of age, C. Regurgitation of food, D. No nausea
B: Appears between 3–5 years of age
Answer: B: Appears between 3–5 years of age 
Explanation: Rumination disorder (Rumination syndrome) 

Rumination disorder is a lesser known form of disordered eating.
Rumination disorder typically develops in infant below the age of one year. Rumination disorder can also be diagnosed in older individuals including children, adolescents and adults.
It involves effortless regurgitation of swallowed or partially digested food.
There is no retching, nausea, odor or abdominal pain associated with this condition like there is with typical vomiting.
Although spontaneous remissions are common, severe secondary complications can develop, such as progressive malnutrition, dehydration, and lower resistance to infections.
Failure to thrive, with absence of growth and development delays in all areas, can occur.