<prompt> Please answer with one of the option in the bracket. Write reasoning in between . Write answer in between .Q:A 60-year-old woman presents to the emergency room with chest pain that started 20 minutes ago while watching television at home. The pain is substernal and squeezing in nature. She rates the pain as 610 and admits to having similar pain in the past with exertion. Her past medical history is significant for diabetes mellitus that is controlled with metformin. The physical examination is unremarkable. An electrocardiogram ECG shows ST-segment depression in the lateral leads. She is started on aspirin, nitroglycerin, metoprolol, unfractionated heparin, and insulin. She is asked not to take metformin while at the hospital. Three sets of cardiac enzymes are negative.Lab results are given below:Serum glucose 88 mgdLSodium 142 mEqLPotassium 3.9 mEqLChloride 101 mEqLSerum creatinine 1.2 mgdLBlood urea nitrogen 22 mgdLCholesterol, total 170 mgdLHDL-cholesterol 40 mgdLLDL-cholesterol 80 mgdLTriglycerides 170 mgdLHematocrit 38Hemoglobin 13 gdLLeucocyte count 7,500mm3Platelet count 185,000 mm3Activated partial thromboplastin time aPTT 30 secondsProthrombin time PT 12 seconds UrinalysisGlucose negativeKetones negativeLeucocytes negativeNitrites negativeRed blood cells RBC negativeCasts negativeAn echocardiogram reveals left ventricular wall motion abnormalities. With the pain subsiding, she was admitted and the medications were continued. A coronary angiography is planned in 4 days. In addition to regular blood glucose testing, which of the following should be closely monitored in this patient?? A: Prothrombin time and platelet count, B: Prothrombin time alone, C: aPTT and platelet count, D: Platelet count alone, E: Activated partial thromboplastin time aPTT alone,  <response>: This is a multiple choice question about a 60-year-old woman who presented to the ER with chest pain and was diagnosed with a likely acute coronary syndrome. She has a history of diabetes and is on metformin. Her workup showed ST depression on ECG, wall motion abnormalities on echo, and cardiac enzymes were negative. She was started on aspirin, nitroglycerin, beta blocker, heparin, and insulin and told to hold metformin. The question asks which of the lab values should be closely monitored in this patient in addition to regular glucose testing. The key points here are:- Patient has ACS and is on anticoagulation with heparin. This puts her at risk of bleeding, so coagulation tests like PTINR and platelets should be monitored. - She is on dual antiplatelet therapy with aspirin and heparin. Platelets should be monitored to watch for thrombocytopenia.- Metformin was held due to risk of lactic acidosis in setting of ischemia. No need to monitor electrolytes or kidney function more closely unless she develops acidosis.C: aPTT and platelet count 