The correct options are
A Nose picking
B Dry air
D A punch
The lining of your nose contains many tiny blood vessels that lie close to the surface and are easily irritated.
The two most common causes nose bleeds are:
a) Dry air - when your nasal membranes dry out, they're more susceptible to bleeding and infections.
b) Nose picking - If a blood vessel inside your nose is very close to the surface, blowing the nose too hard or picking the nose may make it bleed.
Nose bleed can also occur when your nose is hit by something or someone.