Which following scenario is NOT an example of situational irony

a) A man buys a gun to protect himself but someone breaks into his house, finds the gun, and shoots him with it

b) The fire department is on fire

c) You are driving without your seatbelt but notice a cop driving toward you. Not wanting to get pulled over for not wearing your seatbelt, you
quickly try to buckle up but end up getting in a wreck trying to put your seat belt on

d) A person getting to work late because it's raining