Among the following propositions two are related in such a way that they cannot both be true but can both be false. Select the code that states those two propositions. Propositions:(A) Every student is attentive.(B) Some students are attentive.(C) Students are never attentive.(D) Some students are not attentive. Codes :

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Among the following propositions two are related in such a way that they cannot both be true but can both be false. Select the code that states those two propositions. Propositions:<br />(A) Every student is attentive.<br />(B) Some students are attentive.<br />(C) Students are never attentive.<br />(D) Some students are not attentive. Codes :