Function of filiform apparatus is to: 1) Stimulate division of generative 2) Produce nectar 3) Guide entry of pollen tube 4) Recognize the suitable pollen at stigma

Guide entry of pollen tube

No, hiccups arrises because of eating quickly.The stomach disert it and irritates the diaphragm.This lead to its contraction and this lead to the arrise of hiccups

Option 3: guide the pollen tube into the embryo sac. One synergid degenerates after the entry of first male gamete into the egg cell. The second synergid persists till the entry of second male gamete into secondary nucleus

Guide the entry of pollen tube and we know that synergids have filiform apparatus . Out of the two synergids one degenerate and guides entry of pollen tube while other degenerate after entry of pollen tube.