Explanation

Cyanocobalamine or simply cobalamine (vitamin-$B_{12}$) deficiency causes pernicious anaemia. Vitamin-$B_{12}$ is required for RBCs maturation. DNA synthesis, myelin formation, etc. It acts as a co-enzyme. Its sources are fish liver, egg and milk white. It can be best obtained from Spirulina alga (SCP) and mutton. It is the only vitamin, which is not found in vegetables