A slap on the wrist

Do you know the English expression “a slap on the wrist“? Read the conversation below. Can you guess the meaning?

Nicola: What happened to the two students who were caught cheating in the final exam?

Todd: They just got a slap on the wrist. The principal only gave them a warning. He is too soft. If I were the principal, I would have given them a score of zero.

Does it mean:

a) a severe punishment

b) a light punishment

c) no punishment

d) to hit someone on the wrist

The answer is below!↓

 

Answer: b) a light punishment