Answer: The correct answer is 'The projectiles are pellets.'.
Step-by-step explanation:
In shot guns groove and lands are absent where as they are present in rifles or handguns. Primer is used in both the shotguns and rifles. This primer when burns transfers large amount of energy to the projectile to move out of the firearm.
Pellets are shot from shotguns but not from rifles or handguns
In both the shotguns and rifles firing pins are present.
Hence, the correct answer is: 'The projectiles are pellets'.