This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: ULTRASOUND, Subject name: Radiology
POCUS is related to which imaging modality? 
Select and explain. 
A. X-ray, B. Ultrasound, C. CT, D. MRI
B: Ultrasound
Answer: B: Ultrasound 
Explanation: POCUS is ultrasound that's done at the bedside - it's taking the machine and clinician to the patient in the context of clinical care. It is being increasingly used for COVID-19 patients to do ultrasound of CHEST. Typical features of COVID-19 on USG chest are B-lines and sub-pleural consolidation.