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Question

Using __________ is secondary reason for finishing materials ( resources ) fastly.
  1. instruments
  2. both a and b
  3. none of these
  4. vehicles

A
none of these
B
both a and b
C
vehicles
D
instruments
Solution
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B, Vehicles are secondary reasons for finishing resources as number of vehicles are increasing day by day which results in great demand of fuels.

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