MCQ
Antigen$-A$ and antibody$-B$ are present in which blood group:
- A$B$
- ✓$A$
- C$AB$
- D$O$
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$(1)$ Methanogens $(2) $ Anabaena $(3)$ $N_2$, fixation $(4)$ Thermoacido philus $(5)$ eykaryotes $(6)$ Diatoms $(7)$ gelatinous sheath $(8)$ Heterocyst