Which scenario is an example of irony?
a. when the comedian delivered the punch line of his joke, i nearly
died laughing.
b. a tow truck sits stranded on the side of the road with a flat tire.
c. her voice was as warm as butter melting on a hot biscuit.
d. crystal was tired, so she took a six-hour nap.

Option B. A tow truck sits stranded on the side of the road with a flat tire is irony.

Explanation:

Irony is a rhetorical device employed by writers or speakers to present a situation where contrary results of what is expected are obtained resulting in wry humour.

A tow truck is a vehicle provided with special equipment to pull damaged , illegally parked, or immovable vehicles in need of help to be either disposed of or dragged  to a place where they  can be repaired.  It is expected to be a savior carrying immobile vehicles to their destination which is most often a repair shop.

In the given situation, the tow truck is itself not able to ply on the road and is helplessly stranded on the roadside due to a flat tyre.  It is contrary to what is expected and is consequently amusing.  This is an example of irony.

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explanation:

the krebs cycle and electron transport occur in the mitochondria, though other than that i would need to know more information.