In the following number series, two numbers have been put within brackets. Select the most appropriate option for these numbers in relation to their inclusion in the series.21, 24, 19, (29), 17, 28, (15), 30

• A. Both the bracketed numbers are correct.
• B. The first bracketed number (from the left) is correct and the second bracketed number (from the left) is incorrect.
• C. The first bracketed number (from the left) is incorrect and the second bracketed number (from the left) is correct.
• D. Both the bracketed numbers are incorrect.