Choose the correct alternative that will continue the same pattern and replace the question mark in the given series.

1. 

120, 99, 80, 63, 48, ?

A. 35
B. 38
C. 39
D. 40

2. 

589654237, 89654237, 8965423, 965423, ?

A. 58965
B. 65423
C. 89654
D. 96542

3. 

3, 10, 101,?

A. 10101
B. 10201
C. 10202
D. 11012

4. 

In the series 2, 6, 18, 54, ...... what will be the 8th term ?

A. 4370
B. 4374
C. 7443
D. 7434

5. 

125,80,45,20,?

A. 5
B. 8
C. 10
D. 12