High temperature, long day, and low temperature, short day produce which type of flowers in cucurbits?

Correct option is C

In cucurbits, different environmental conditions regulate flower formation:
· High temperature, long days: Promote male flowers.
· Low temperature, short days: Promote female flowers.
· Together, both male and female flowers are produced.
Important Point: Temperature and photoperiod manipulation are critical for sex expression in cucurbits.