12. Catherine is a 72-year-old female has a 20-mninute episode of difficulty expressing herselt, right arm and band weakness. You have the following information:
(1) Past medical history: HTN, CAD, dyslipidemia.
(2) Medications: clopidogrel 75 mg qd, amlodipine 5 mg qd, irbesartan 150 mg/HCTZ 12.5 mg qd.
(3) BP: 132/82 mmHg, LDL 103 mg/dL
(4) MRI: small diffusion-weighted imaging lesion in the left frontal cortex, 3 small microbleeds in the basal ganglia, mild periventricular hyperintensities
 (5) MRA: 30% left internal carotid artery origin stenosis
 if you are considering adjusting medications, which of the following is incorrect?
(A) Check for heart rhythm to ensure that there is no concomitant or paroxysmal AF.
(B) If no AF, patient should be treated with DAPT immediately. Clopidogrel plus aspirin is indicated.
(C) Clopidogrel has less eficacy in CYP3A4 loss-of-function carriers than non-carriers.
(D) In this patient with a 30% left internal carotid artery origin stenosis, ticagrelor-aspirin is also a good choice.