Choose the appropriate synonym of the underlined word:
It’s only a small mistake so don’t worry about it.
A. Boo-boo
B. Bacon
C. Blind
D. None of the above

Hint: Mistake is a noun which can be defined as an error or an act wherein you do something unintentionally.

Complete answer:
The word mistake is typically used when a person performs an action that can cause unintended or unwanted results. It is a countable noun and can either be used with verbs, adjectives, prepositions, or adverbs. For example: I accept my mistake.
Let us examine the given options to find the correct synonym of mistake.
Boo-boo- Boo-boo is a synonym to the word mistake. Boo-boo is often used in informal English. For example: Buck up, Rosie! This is not the first time you are making a boo-boo. Therefore, boo-boo is a correct option.
Bacon- Bacon is a type of meat, typically pork. Bacon is usually eaten for breakfast and it’s famous among Americans. For example: I take bacon and scrambled eggs for breakfast. Hence, option B is not an incorrect option.
Blind: Blind means visually impaired. For example: I recently went to a blind school. Hence, option C is not an incorrect option.
None of the above: Since option A fulfils the purpose of the above sentence, option D is an incorrect option.
And hence option A is the correct answer.

Note: Mistake can also be defined as a misconception/misunderstanding or it can also mean something that happened accidently. For example: I took your pen by mistake.