Question

Match the Column I with Column II and choose the correct option using the codes given below.

Column I	Column II
(a) Penicillium notatum	(i) Production of yoghurt
(b) Chlorella	(ii) Nitrogen fixation
(c) Rhizobium	(iii) Sewage disposal
(d) E. coli	(iv) Antibiotics
	(v) Production of vitamins in the large intestine

• A. a- (iii), b- (v), c- (ii), d- (i)
• B. a- (iv), b- (iii), c- (ii), d- (v)
• C. a- (iv), b- (ii), c- (iii), d- (v)
• D. a- (v), b- (iv), c- (ii), d- (i)

Answer 1

The correct option is B a- (iv), b- (iii), c- (ii), d- (v)

Alexander Fleming observed that colony of the bacterium Staphylococcus aureus failed to grow in those areas of a culture that had been accidentally contaminated by the green mold, Penicillium notatum.
Symbiotic nitrogen fixation occurs in plants that harbor nitrogen-fixing bacteria within their tissues. The best-studied example is the association between legumes and bacteria in the genus, Rhizobium.
E. coli is a facultative bacteria which is used for the production of vitamins in the large intestine.

Chlorella is used to remove nitrogen in the form of ammonia and/or ammonium ions from waste water effluent in a local wastewater treatment plant.

So, the correct answer is option B.