The primitive prokaryotes responsible for the production of biogas front the dung of ruminant animals include the
(a) thermoacidophiles
(b) methanogens
(c) eubacteria
(d) halophiles
Correct option(b) methanogens
Explanation:
Methanogens are group of obligate anaerobic ancient and primitive bacteria. They are involved in methanogenesis and produce methane gas in ruminant of cattle.