In a Typical Angiosperm, What Is the Sequence of Structures

Multiple Choice

In a typical angiosperm, what is the sequence of structures encountered by the tip of a growing pollen tube on its way to the egg?
1) micropyle
2) style
3) ovary
4) stigma

A) 4 → 2 → 3 → 1
B) 4 → 3 → 2 → 1
C) 1 → 4 → 2 → 3
D) 1 → 3 → 4 → 2
E) 3 → 2 → 4 → 1