10. C is the correct answer. With hyperkalemia you get reduction in the size of the P Wave and development of T Waves. Severe hyperkalemia leads to widening the QRS complex . In RVH you may see Right Axis Deviation, Tall R waves in lead V1, slight increase in QRS duration, and and may see right bundle branch pattern in lead V1. There is no ST elevation so there is no infarction.
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