Question

Please help me, My Physical Education teacher asked a bonus question that I do not understand.

What has 4 letters, sometimes 9 letters, but never has 5 letters.
True or false? - explain your answer ​

Answer 1

True is the correct answer

Answer 2

True

The word "what" has four letters, the word "sometimes" has 9, and the word "never" has 5

It's a riddle