This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Childhood tumors, Subject name: Pediatrics
Treatment for childhood hypothyroidism is with 
Select and explain. 
A. T4, B. T3, C. Levothyroxine, D. TSH
C: Levothyroxine
Answer: C: Levothyroxine 
Explanation: Levothyroxine is used for the treatment of childhood hypothyroidism.In case of congenital hypothyroidism,treatment should be staed immediately after diagnosis.The initiation dose is 10-15 microgram/kg/day.T4 & TSH are expected to normalise over one week and one month,respectively,with this treatment.Lifelong thyroid replacement is required for most cases. In acquired hypothyroidism,treatment should be gradual.A dose of 100 microgram/m2/day is recommended.Levothyroxine should be given empty stomach in the morning.Followup should be done every 3 months during the first 2 years of therapy and six monthly thereafter.Most children require lifelong therapy. Reference:Essential pediatrics-Ghai,8th edition,page no:517,518.