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.
1, 9, 25, 49, (81), 121, 169, (215), 289

Options

A. Both the bracketed numbers are incorrect.
B. The first bracketed number is incorrect and the second is correct.
C. The first bracketed number is correct and the second is incorrect.
D. Both the bracketed numbers are correct.

Answer

C

Explanation

The series is of squares of odd numbers. Out of the bracketed numbers 81 and 215, 81 is correct and 215 is incorrect.
`9^2 =81`
`15^2 = 225`
Option C is correct.