This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Proteins and Amino Acids, Subject name: Biochemistry
The amino acid which serves as a carrier of ammonia from skeletal muscle to liver is: 
Select and explain. 
A. Alanine, B. Methionine, C. Arginine, D. Glutamine
A: Alanine
Answer: A: Alanine 
Explanation: Ans. A. AlanineTransport form of Ammonia from most tissues including brain is GlutamineTransport form of Ammonia from skeletal muscle is Alanine.