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Consider the following statements:

1. All machines consume energy.

2. Electricity provides energy.

3. Electrically operated machines are cheap to maintain.

4. Electrically operated machines do not cause pollution.

Which one of the following inference can be drawn from the above statement?


1. All machines are run by electric energy
2. There is no form of energy other than electricity
3. Most machines are operated on electric energy
4. Electrically operated machines are preferable to use

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Correct Answer - Option 4 : Electrically operated machines are preferable to use

Given statements:

i). All machines consume energy.

ii). Electricity provides energy.

iii). Electrically operated machines are cheap to maintain.

iv) . Electrically operated machines do not cause pollution.

Let us now examine the given inferences:

1) All machines are run by electric energy. → False (as it is possible but not definite)

2) There is no form of energy other than electricity. → False (as it is possible but not definite)

3) Most machines are operated on electric energy. → False (as it is possible but not definite)

4) Electrically operated machines are preferable to use. → True

Hence, 'Electrically operated machines are preferable to use' is the correct answer.

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