Causes of Vit. B12 deficiency megaloblastic anemia-: (A) Fish tap worm infestation, (B) Dilantin therapy, (C) Gastrectomy, (D) Ileal resection
Answer is A. Fish tapeworm competes with cells in the ilium for vitamine B12 there by causing its defficiencyin the body. Reference:Exam preparatory manual for UGs by Ramdas Nayak Page no.:256