The following sentence has been divided into parts. One of them contains an error. Select the part that contains the error from the given options.
"I am sorry / to intrude by / you at / such a time."

Correct option is C

Explanation of the Correct Answer: · The phrase "to intrude by" is incorrect.
· The correct preposition to use with "intrude" is "on" or "upon."
· Correct phrase: "to intrude on you at such a time."
Why Are the Other Options Incorrect? · (a) "such a time." → No error.
· (b) "you at" → No error.
· (d) "I am sorry" → No error.
Thus, the correct sentence is:
"I am sorry to intrude on you at such a time."