A2-year-old male is brought to the clinic, weighing 55% of his ideal body weight and without edema. Which of the following statements about this condition is least accepted?

a. The diagnosis in this case is likely marasmus
b. Extreme wasting is a characteristic feature
c. Diarrhea is nearly always present
d.The child's abdomen i s typically protruded
e. Irritability is a common symptom associated with this condition