Identify the incorrect part of the following sentences. Not 'only' he 'cheated' in the exam 'but also' he argued 'at' the teacher, 'No error'

Identify the incorrect part of the following sentences. Not 'only' he 'cheated' in the exam 'but also' he argued 'at' the teacher, 'No error'

• only (Incorrect)
• cheated (Incorrect)
• but also (Incorrect)
• at (Correct)
• No error (Incorrect)