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Statement and Argument - Verbal and Reasoning

Directions to SolveEach question given below consists of a statement, followed by three or four arguments numbered I, II, III and IV. You have to decide which of the arguments is/are 'strong' arguments) and which is/are 'weak' arguments) and accordingly choose your answer from the alternatives given below each question.
Q1:

Statement: Should India immediately stop digging coal from its mines? Arguments:
  1. Yes. The present stock of coal will not last long if we continue mining at the present rate.
  2. No. We do not have alternate energy source of sufficient quantity.
  3. No. This will put millions of people at a disadvantage and their lives will get adversely affected and also the industry.

A Only I and II are strong

B Only II and III are strong

C Only I and III are strong

D All are strong

E None is strong

ANS:B - Only II and III are strong

Explanation: Though the reserves of coal are limited, yet stopping its use till alternate sources of energy have been discovered, is no solution to conserve it. So, I is not strong. It is true that we haven't till date found a renewable source of energy which is available in plenty and can substitute coal. So, II holds strong. Further, stopping coal mining would surely throw the engaged workers out of employment. So, III also holds strong.