A series is given with one term missing. Select the correct alternative from the given ones that will complete the series.
4, 9, 25, 64, 169, ?

Let's evaluate the given terms as perfect squares:
4=2
2


9=3
2


25=5
2


64=8
2


169=13
2


Notice the base numbers under the squares: 2,3,5,8,13.
This forms a Fibonacci-like sequence where each subsequent base is the sum of the previous two bases:

2+3=5

3+5=8

5+8=13

8+13=21

So, the next base number is 21.
The next term in the series will be 21
2
=441.