26june2019 paper1 Q24

24If proposition ‘All republics are grateful’ is taken to be true, then which of the following
propositions can be false?
(i) Republics are not grateful
(ii) Some republics are not grateful
(iii) No republics are grateful
(iv) Some republics are grateful
Select the correct answer from the options given below

Option : C
Explanation : The given proposition are 'All republics are grateful'
It's negative proposition are 'No republics are grateful'
or 'Republics are not grateful' . This is equivalent to 'Some republics are not grateful'.

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