This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: AIIMS 2019, Subject name: Medicine
Which of the following cannula is used in patient with severe dehydration and diarrhea? 
Select and explain. 
A. Blue, B. Green, C. Grey, D. Pink
C: Grey
Answer: C: Grey 
Explanation: Severe shock - 16G /Grey Pediatrics/ Geriatrin - 22g/blue Routine maintenance IVF/ Adult male Antibiotic / blood transfusion - 18g/ green Adult female antibiotic - 20g/pink