This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: NEET Jan 2020, Subject name: Biochemistry
Vitamin B12 is found maixmum in: 
Select and explain. 
A. Animal products, B. Green leafy vegetables, C. Roots and tubers, D. Sunlight
A: Animal products
Answer: A: Animal products 
Explanation: Vitamin B12 Synthesized exclusively by microbes. Dietary sourceis exclusively ofanimal origin Vitamin B12deficiency clinical manifestations: Haematological: Megaloblastic anemia, Hypersegmentation of neutrophils. Neurological: Demyelination in peripheral nerves and spinal cord