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Discussion

Select the most appropriate option to fill in the blanks.

In India, the _____ of barrages and dams on rivers has obstructed the movement of hilsa, a migrating fish. Under the Clean Ganga Mission, efforts have been made to conserve and _____ the number of hilsa.

  • A.building, decrease
  • B.establishment, decline
  • C.making, hike
  • D.construction, increase

Answer: D

The pair is construction, increase.

The construction of barrages and dams obstructed the fish, and efforts to conserve the hilsa would aim to increase its number.

'Decrease' and 'decline' contradict conservation, and 'making' and 'hike' are not natural with barrages and with a number of fish.

The second blank must mean something that conservation efforts aim at, and the number of hilsa must increase for conservation to succeed. The first blank, 'construction of barrages and dams', is the usual phrase. The pairs with 'decrease' or 'decline' do not suit the aim of conserving fish.

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