UGC NET Questions (Paper – 1)

Statements A, B and C describe how to handle clocks that do not keep correct time. A is correct because a gaining clock runs ahead of real time. B is true since losing 5 minutes per hour over 12 hours accumulates a loss of 60 minutes, i.e. one hour. C is also correct because we treat the error per hour as a rate and compare it with a complete 60-minute error to see when the clock will be exactly one hour fast or slow and thus again coincide with the correct time on the dial. D is false because gain or loss cannot be ignored in problems about correct readings, and E is false because there is no guarantee that the error aligns perfectly at midnight. Thus A, B and C only are correct.

Option A:
Option A is incomplete as it gives only A and B and omits C, which explains the method of using the error rate to determine when the clock again shows the correct reading. Without C, the understanding of such problems is not complete.

Option B:
Option B is correct since it includes all three true statements and excludes D and E, which disregard or misdescribe the impact of gain or loss. It directly corresponds to the typical reasoning steps required in NET-level clock questions.

Option C:
Option C is wrong because it introduces D, which incorrectly claims that gain or loss can always be ignored, even though angle-based questions sometimes require perfect time. Including D mixes an error into the option.

Option D:
Option D is also incorrect as it omits A and instead lists only B and C, without clearly distinguishing faulty clock behaviour from standard angle problems, and still does not address the false ideas in D and E explicitly.