This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Pharmacology
Which of the following is NOT an adverse effect of heparin ? 
Select and explain. 
A. Bleeding, B. Thrombocytopenia, C. Hypokalemia, D. Osteoporosis
C: Hypokalemia
Answer: C: Hypokalemia 
Explanation: None