Question

what does deficiency of vitamin B12 cause

Answer 1

heya!!
here is ur answer....
weakness and fatigue are the deficiency of vitamin b12 that is cyanocobalamin.

hope helpful...

Answer 2

______ ${hey\:mate \:ur\: ans\:}$______

$\textbf{the\: deficiency\: of\:vitamin\: b12\: cause\:}$

${pernicious\: anemia\: it\: is\: a\: severe\: couple\: with\: great\: weakness\:}$

hope it helps