Select the correct combination of statements (I-IV) regarding the characteristics of certain org...

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Select the correct combination of statements (I-IV) regarding the characteristics of certain organisms.
I. Methanogens are archaebacteria, which produce methane in marshy areas.
II. Nostoc is a filamentous blue-green algae, which fixes atmospheric nitrogen.
III. Chemosynthetic autotrophic bacteria synthesise cellulose from glucose.
IV. Mycoplasma lacks a cell wall and can survive without oxygen.
The correct statements are
(A) II and III
(B) I, II and III
(C) II, III and IV
(D) I, II and IV
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