Pernicious anaemia is caused due to
absence of vitamin-K
lack of Vitamin - B12
lack of Vitamin - C
presence of intrinsic factor
B.
lack of Vitamin - B12
Cyanocobalamine or Vitamin - B12 is obtained from milk, egg, liver, fish and also synthesized by some colon bacteria. Its deficiency causes pernicious anaemia with large, immature, nucleated RBCs devoid of haemoglobin.