A five-year-old child who was brought to an emergency department with the complaints of multiple episodes of vomiting, followed by watery diarrhea, which was offensive in odor. On examination, child was lethargic and skin pinch goes back very slowly, but the capillary refill time and BP were normal. So, question A, what is your diagnosis? Question B, what investigations would you need to support your diagnosis? Question C, mention four possible complications. Question D, how would you manage the case? Mention about the amount, choice, and route of administration of the fluid.

Answer it for me