<prompt> Please answer with one of the option in the bracket. Write reasoning in between . Write answer in between .Q:A 7-year-old boy is brought to the emergency room because of severe, acute diarrhea. He is drowsy with a dull, lethargic appearance. He has sunken eyes, poor skin turgor, and dry oral mucous membranes and tongue. He has a rapid, thready pulse with a systolic blood pressure of 60 mm Hg and his respirations are 33min. His capillary refill time is 6 sec. He has had no urine output for the past 24 hours. Which of the following is the most appropriate next step in treatment?? A: Give initial IV bolus of 2 L of Ringers lactate, followed by packed red cells, fresh frozen plasma, and platelets in a ratio of 1:1:1, B: Give antidiarrheal drugs, C: Start IV fluid resuscitation with normal saline or Ringers lactate, along with monitoring of vitals and urine output, D: Start IV fluid resuscitation by administering colloid solutions, E: Provide oral rehydration therapy to correct dehydration,  <response>: Based on the description in the question stem, this is a case of severe dehydration likely caused by acute diarrhea in a child. The key findings are severe diarrhea, drowsiness, poor skin turgor, dry mucous membranes, rapid thready pulse, hypotension, delayed capillary refill, and no urine output for 24 hours. This indicates the child is in hypovolemic shock and needs urgent IV fluid resuscitation. Options A and D involving blood products and colloids are not indicated as initial therapy. Oral rehydration option E is insufficient given the severity. Antidiarrheals option B do not address the urgent issue of volume resuscitation. Option C of starting isotonic crystalloid solution like normal saline or Ringers lactate with close monitoring is the most appropriate next step. C: Start IV fluid resuscitation with normal saline or Ringers lactate, along with monitoring of vitals and urine output 