Select the most appropriate meaning of the underlined word.
The scientist observed a peculiar p̲h̲e̲n̲o̲m̲e̲n̲o̲n̲ in the laboratory.

Correct option is B

The correct answer is option (b) An observable fact or event.
Phenomenon refers to a fact, situation, or event observed to exist or happen, especially one whose cause or explanation is in question. (कोई असाधारण या ध्यान देने योग्य घटना)
Example: Aurora Borealis is a beautiful natural phenomenon seen near the poles.
Extended meanings of other options:
· (a) A type of animal – irrelevant; “phenomenon” is not a biological category
· (c) A mathematical equation – equations represent relationships; not physical observable events
· (d) A rare flower – a noun phrase, but unrelated to the scientific use of "phenomenon"