what is the answer to the question

The phrase in the question translates to "January 1st is called," so the answer you would be looking for is "New Year's Day," which is option D. in the answer choice.
Bonjour
Le premier janvier s'appelle le jour de l'An.
l'anniversaire = the birthday
fête des pères = The Father's Day
l'action de grâce = Thanksgiving
le jour de l'an = New Year's Day
☺☺☺