This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: C.V.S, Subject name: Medicine
ALL of the following statement regarding the ECG in acute pericarditis are true except - 
Select and explain. 
A. T wave inversions develop before ST elevation retur to baseline, B. Global ST segment elevation is seen in early pericarditis, C. Sinus tachycardia is a common finding., D. PR segment depression is present in majority of patients
A: T wave inversions develop before ST elevation retur to baseline
Answer: A: T wave inversions develop before ST elevation retur to baseline 
Explanation: Ref: R.Alagappan Manual for Medicine 4th Edition pg no:112 Acute Pericarditis ECG shows * Sinus tachycardia * An elevated, concave upwards S-T segment * Upright, tall, peaked T-waves (earliest change) * No reciprocal changes in the opposite leads.