This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Endocrinology, Subject name: Pharmacology
Levothyroxine is used in: 
Select and explain. 
A. Thyroid storm, B. Cretinism, C. Endemic goiter, D. Grave's disease
B: Cretinism
Answer: B: Cretinism 
Explanation: L-thyroxine is thyroxine analogue. It has a a more sustained and uniform action. It is used in cretinsm and in hypothyroidism it contains T4 T3 medication is liothyronine which is used very rarely -only in myxedema coma (REF.Essential of medical pharmacology K D TRIPATHI 6 Edition, Page No - 248)