This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: DNB 2018, Subject name: Physiology
Thyroxine is transpoed by? 
Select and explain. 
A. Albumin, B. Transthyretin, C. Transferrin, D. Ceruloplasmin
A: Albumin
Answer: A: Albumin 
Explanation: Transpo proteins for thyroxine: - 1. TBG - Thyroid binding globulin high affinity, low capacity. 2. TBPA - Thyroid binding prealbumin. 3. Albumin - Low affinity, high capacity. 4. Transthyretin - Very small quantity for thyroxine transpo. Transferrin - Fe2+ transpo Ceruloplasmin - Cu2+ transpo.