निम्नलिखित में से कौन से कथन तार्किक रूप से समतुल्य हैं? A. सभी हवाई जहाज प्रदूषण फैलाने वाले वाहन हैं। B. कोई भी प्रदूषण फैलाने वाला वाहन हवाई जहाज नहीं है। C. सभी गैर-प्रदूषणकारी वाहन गैर-हवाई जहाज हैं। D. कोई भी हवाई जहाज गैर-प्रदूषणकारी वाहन नहीं है। नीचे दिए गए विकल्पों में से सही उत्तर चुनिए:

Directions: In each of the following questions, three statements are followed by three conclusions numbered I, II, and III. Take the given statements to be true even if they seem to be at variance with commonly known facts. Read all the statements carefully and decide which of the conclusions logically follow. Statements: Only a few books are covers. Some covers are bright. No bright is device. Conclusions: I. Some books are device. II. Some bright are covers. III. Some device are covers.

Directions: In each of the following questions, three statements are followed by three conclusions numbered I, II, and III. Take the given statements to be true even if they seem to be at variance with commonly known facts. Read all the statements carefully and decide which of the conclusions logically follow. Statements: Only a few metal are dust. Some dust are stone. All stone are heat. Conclusions: I. Some dust are heat. II. Some heat are not metal. III. Some metal are stone.