Option (c) is correct

If the statement "No aeroplanes are electric vehicles" is true, then it means that there is no overlap between the set of aeroplanes and the set of electric vehicles. In other words, all aeroplanes are not electric vehicles. Based on this, we can infer that proposition (c) "Some aeroplanes are not electric vehicles" is true. This is because if all aeroplanes are not electric vehicles, then it follows that there must be some aeroplanes that are not electric vehicles.

Propositions (a) and (b) cannot be inferred to be true from the given statement. Proposition (a) states that all aeroplanes are electric vehicles, which is the opposite of what the statement tells us. Proposition (b) is ambiguous and could be either true or false based on the given statement.

Proposition (d) is unrelated to the given statement and cannot be inferred from it. Therefore, option (c) is the correct answer.

विकल्प (c) सही है।

प्रश्नानुसार "कोई भी विमान इलेक्ट्रिक वाहन नहीं होता है" को सत्य के रूप में दिया गया है जो कि [E] प्रतिज्ञप्ति है।

इसलिए उपरोक्त विरोध के पंरपरागत वर्ग के अनुसार सभी दिए विकल्पों में से केवल "कुछ वाहन इलेक्ट्रॉनिक वाहन नहीं होते हैं" [O] प्रतिज्ञप्ति को ही तात्कालिक रूप से सत्य माना जा सकता है।