Concept:Certain verbs in English are followed by fixed prepositions; "accused" is always followed by "of," not "for."
Explanation:The error is in part (a) of the sentence.
The verb "accused" requires the preposition "of" to indicate the crime or wrongdoing.
It is incorrect to say "accused for murder."
Other common examples of fixed verb-preposition pairs include: "afraid of," "conform to," "devoid of," "insist on," and "versed in."
Therefore, the correct phrase should be "accused of murder."
The rest of the sentence ("but the court found him not guilty and acquitted him") has no errors.
The corrected sentence is: "Mr. Smith was accused of murder but the court found him not guilty and acquitted him."
Answer:Option A (part a) contains the error.