Select the option that is appropriate regarding the following two statements labelled Assertion and Reason. Assertion: To prevent water logging, intercepting drains can be provided along the course of irrigation canals, in places where the percolation of water is detected. Reason: The percolating water is intercepted by drains and the water is carried to other natural water courses.
- AAssertion is true, but Reason is false.
- BBoth Assertion and Reason are false.
- CBoth Assertion and Reason are true and Reason is the correct explanation of Assertion.Correct
- DBoth Assertion and Reason are true, but Reason is not the correct explanation of Assertion.
Solution
Concept
Intercepting (catch) drains along canals collect seepage water and carry it away, so the water table does not rise.
Step-by-step solution
1. Water logging happens when the ground water table rises near the root zone. 2. Seepage from canals is a main cause of this rise. 3. Intercepting drains are dug along the canal where seepage is seen. 4. These drains catch the seeping water and carry it to natural streams or drains. 5. So the Assertion is true, the Reason is true, and the Reason explains how the drains prevent water logging.
Explanation
Intercepting drains run along the canal and catch the water that seeps out of it. This water is carried to natural water courses, so it cannot raise the water table. The Reason explains why the Assertion is true.
Why the other options are wrong
A: The Reason is also true. B: Both statements are true, not false. D: The Reason directly explains how intercepting drains prevent water logging.
Shortcut
Drain catches seepage and sends it away, so the water table stays low. The Reason gives the working of the Assertion.
Common mistake
Choosing D by treating the Reason as only a separate fact, not the working principle.
Correct answer: C) Both Assertion and Reason are true and Reason is the correct explanation of Assertion.