Choose the correct answer from the alternatives given.
Which of the following statements is not true about photoperiodism?

A short-day plant flowers when the day length is shorter than some critical length

A day-neutral plant flowers according to some form of regulation other than photoperiodism

A long-day plant will flower even when the day period is not long enough if there is a short period of light during the dark period.

Phytochrome form Pfr is converted to Pr in daylight, producing the active form that induces flowering in long-day plants