He was accused …… stealing his aunt’s necklace. A. for B. with C. of D. on

The correct answer is C. of.

The preposition “of” is used to indicate that someone is accused of doing something. In this case, the speaker is accusing the person of stealing his aunt’s necklace.

The other options are not correct because they do not make sense in the context of the sentence.

• The preposition “for” is used to indicate the purpose of something. For example, “I went to the store for milk.”
• The preposition “with” is used to indicate that someone is doing something together with someone else. For example, “I went to the store with my friend.”
• The preposition “on” is used to indicate that something is happening at a particular time or place. For example, “I went to the store on Tuesday.”

I hope this helps!