Vitamin `B_(12)` is available to ruminants by

Options

A. Plants
B. Micro-organisms in caecum
C. Animals
D. All of the above

Answer

b

Explanation

(b) Vitamin `B_(12` is not plants . However it is considered that spirulina (an algae ) contain `B_(12)` , Vitamin `B_(12)` is synthesized by intestinal bacteria which infact are main source of vitamin `B_(12)` . Many microorganisms (bacteria ) of the stomach of ruminant mammals also synthesize large quantities of vitamin `B_(12)` .