Select the option that is appropriate regarding the following two statements pertaining to lining of canals, labelled as Assertion and Reason. Assertion: The expenditure on lining depends on the availability of construction materials and transportation charges. Reason: To reduce the expenditure on lining, materials which are available in the vicinity of the project should be utilised.
- ABoth Assertion and Reason are true and Reason is the correct explanation of Assertion.
- BBoth Assertion and Reason are false.
- CBoth Assertion and Reason are true, but Reason is not the correct explanation of Assertion.Correct
- DAssertion is true, but Reason is false.
Solution
Concept
Lining cost depends on material availability and transport cost, so local materials are preferred.
Step-by-step solution
1. Check Assertion: lining cost depends on the cost of materials and the cost of carrying them to site. This is true. 2. Check Reason: using materials found near the project lowers transport cost and total cost. This is true. 3. Check the link: the Reason is advice that follows from the Assertion. It does not explain why cost depends on materials and transport. 4. So both are true, but the Reason is not the correct explanation. Answer is C.
Explanation
Both statements are correct. The Assertion states a fact about cost. The Reason gives a method to save money, which is a result of the Assertion, not the cause of it.
Why the other options are wrong
A: The Reason is a consequence of the Assertion, not its explanation. B: Both statements are actually true. D: The Reason is true, because local materials do reduce lining cost.
Shortcut
If the Reason only gives a recommendation that follows from the Assertion, the answer is usually 'both true, not correct explanation'.
Common mistake
Choosing A just because both statements talk about cost and materials.
Correct answer: C) Both Assertion and Reason are true, but Reason is not the correct explanation of Assertion.