In the following questions, some parts of the sentences have errors and some are correct. Find out which part of a sentence has an error and the number of that part is your answer . If a sentence is free from errors, your answer is No. error.Question:A study is going underway to determine the exact concentration of lead in the water supply.

• A. of lead in the water supply
• B. to determine the exact concentration
• C. No error
• D. A study is going underway