Fill in the blanks with most appropriate option. |
Bio-gas is an excellent fuel as i1 contains up to 75% ___(i)___ . It burns without smoke, leaves no residue like ash in wood. Its heating capacity is ___(ii)___ . The slurry left behind is removed periodically and used as excellent manure, rich in ___(iii)___ and ___(iv)___. |
A)
(i)
(ii)
(iii)
(iv)
Methane
High
Nitrogen
Phosphorous
B)
(i)
(ii)
(iii)
(iv)
Nitrogen
Low
Methane
Phosphorous
C)
(i)
(ii)
(iii)
(iv)
Methane
Low
Nitrogen
Oxygen
D)
(i)
(ii)
(iii)
(iv)
Oxygen
High
Nitrogen
Phosphorous
Correct Answer: A
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