<prompt> True statement regarding nitrates in myocardial perfusion study:-Stress agentDecreased myocardial flow in ischemiaEnhances the detection of myocardial bility in Thallium 201 radiopharmaceutical agentReduced collateral flow into ischemic zone  <response>: Nitrates in myocardial perfusion study Enhances the detection of myocardial bility in Thallium 201 radiopharmaceutical agent Causes increased myocardial flow in ischemia Increases collateral flow into ischemic zone Stress agents used in myocardial perfusion study Dobutamine Adenosine To study Myocardial bility 18-FDG PET best agent Nitrate augmented Thallium 201 Scintigraphy Dynamic contrast enhanced MRI 