The RBC deficiency is deficiency disease of :
Vitamin B_{12}
Vitamin B_{6}
Vitamin B_{1}
Vitamin B_{2}
Deficiency of vitamin B_{12} causes Pernicious anaemia which is RBC deficiency in haemoglobin. Deficiency of vitamin B_{2} (Riboflavin) causes cheilosis, digestive disorders and burning sensation of the skin. Deficiency of vitamin B_{6} (Pyridoxine) causes Convulsions. Deficiency of vitamin B_{1} (Thiamine) causes Beri-Beri (loss of appetite and retarded growth).
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