This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Biochemistry
Which of the following patient require Vit B12 supplementation? 
Select and explain. 
A. Patient on strict vegetarian diet, B. Patient with normal B12 level having dementia, C. Patient with elevated homocystein level, D. General debility
A: Patient on strict vegetarian diet
Answer: A: Patient on strict vegetarian diet 
Explanation: Dietary deficiency of  B12,  is seen among the  strict  vegetarians of  low  socioeconomic group in the developing countries (lndia, Srilanka etc.).