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: Ans. is 'd' i.e., Hyperkalemia Precaution should be taken in following conditions (enhance digitalis toxicity), o Hypokalemia o Advanced age o Myxoedema o Hypomagnesemia o Hypoxia o Thyrotoxicosis o Hypercalcemia o Renal insufficiency o Acute MI o Acute myocarditis (as in rheumatic carditis) Note: o Option a & b are not contraindications. But, they enhance digitalis toxicity, so may be considered as relative contraindications.