Correct Option (D)
The first statement defines UFOs as "Unidentified Flying Objects," which inherently signifies that their nature, origin, or purpose is unknown. While the other statements discuss the possibility of life on other heavenly bodies and the established fact of space voyage, they do not provide any information that identifies UFOs or links them definitively to any specific origin or phenomenon. Therefore, based solely on the provided statements, no conclusive information can be derived regarding UFOs.
Incorrect Options:
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Option A: UFOs are heavenly bodies
Statement 1 identifies UFOs as "Unidentified Flying Objects," implying they are objects that fly, not celestial bodies (heavenly bodies) themselves. The statements provide no basis to equate UFOs with heavenly bodies. -
Option B: UFOs are sent from other heavenly bodies
Statement 1 only mentions claims of seeing UFOs, which are unidentified. Statement 2 indicates that life on other heavenly bodies is a possibility, but this does not confirm its existence, nor does it suggest that such life sends objects to Earth. The given statements do not provide any evidence to conclude that UFOs originate from other heavenly bodies. -
Option C: Some living species in other heavenly bodies are more intelligent than man
Statement 2 merely posits the possibility of life on other heavenly bodies. It offers no information about the existence of such life, its intelligence level, or any comparison of its intelligence with that of humans. This conclusion cannot be drawn from the provided statements.