some of the sentence are grammatically correct and some are incorrect. Find which part of the sentence has an error and mark that part. If there is no error,mark that part as your answer
`("The well-known pianist")/a` `("had to practice for several hours a day")/b` `("even after he rose to fame")/c` `("No error")/d`

Explanation

(b) Use .practice. in place of .practice.