<prompt> Select the TRUE statement about vitamin B12:Does not act as cofactorInvolved in the transfer of amino groupsRequires a specific glycoprotein for its absorptionDietary requirement is met by intake of plant products  <response>: Option analysis:- Methyl cobalamine and 5-deoxy adenosyl cobalamine are the coenzyme forms of vitamin B12 - option a is excluded. Vitamin B6 is involved in the transfer of amino groups, not B12 - option b is excluded. Dietary source milk, curd, cheese, egg, liver, meat, fish of B12 is exclusively of animal origin and there no plant source of vitamin B12 - option d is excluded Intrinsic factor IF, also known as gastric intrinsic factor GIF, is a glycoprotein produced by the parietal cells of the stomach. It is necessary for the absorption of B12 in the ileum - so, option c is the answer. 