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 a contraindication for use of digitalis: 
Select and explain. 
A. Acute rheumatic carditis, B. Thyrotoxicosis, C. WPW syndrome, D. Hyperkalemia
D: Hyperkalemia
Answer: D: Hyperkalemia 
Explanation: None