A) Halophiles
B) Thermoacidophiles
C) Methanogens
D) Eubacteria
Correct Answer: C
Solution :
| [c] Archaebacteria are considered as most primitive prokaryote which appeared on earth for the first time as it could survive through the anaerobic harsh environment present that time. |
| Halophilus, Thermoacidophiles and Methanogens are Archaebacteria. |
| Methanogens are present in the rumen of cattle that is present in dung as well. It helps in production of methane gas that is a component of biogas. |
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