This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General anatomy, Subject name: Anatomy
An athelete came to casuality with 3 days history of passing red colour urine.most propable cause of red colour urine in this condition is- 
Select and explain. 
A. Hemoglobinuria, B. Myoglobinuria, C. Hematuria, D. Hemosiderinuria
B: Myoglobinuria
Answer: B: Myoglobinuria 
Explanation: Both hemoglobin and myoglobin give red colour to urine. Here the patient is athelete, due to strenous activity , myoglobin may be excreted in urine ,which is giving red colour to urine . Ref:physiology and pathology of urine by john dixon ,pg no. 49