Which of the following is a correct pair of singular and plural?
Answer & explanation
Correct answer: option 1
The correct answer is Option (1) → Phenomenon : Phenomena
Plural of nouns ending in -on:
A few nouns that come from Greek change -on to -a in the plural. So phenomenon → phenomena. A phenomenon is a fact or event that can be seen, like rain or an eclipse.
Why the Other Options are Incorrect?
Option 2: Piano : Pianoes — Incorrect. Piano takes only -s. Piano → Pianos.
Option 3: Echo : Echos — Incorrect. Echo takes -es. Echo → Echoes.
Option 4: Hero : Heros — Incorrect. Hero also takes -es. Hero → Heroes.