Q. The activity of an enzyme is affected by 1.The presence of an electrolyte 2.Temperature 3.pH 4.dilution Select the correct answer by using the code below,

• A. 3 and 4 only
• B. 1, 2, 3 and 4
• C. 2 and 3 only
• D. 1, 2 and 3 only

Correct Answer: D