Indicate which drug-receptor interaction is shown at the arrow drug design

You may talk about this picture:

A: it is an ionic bond (which is a strong interaction, between two close atoms which has a large difference in their charges, like azote and oxygen) 
B: is a hydrogen bond (between O in a side and H in the other side)
C: it could be a Van der Waals bond (small interaction between Carbon and hydrogen from different sides (London interaction))
D: Hydrogen bond (between the Oxygen and hydrogen from different sides)
E: it's an ionic bond

Probably a behavioral adaptation