How many odd numbers are followed by the odd number in the above sequence?

Explanation : 

Let’s solve this step by step.

1) First, marking all odd numbers in the sequence:
5,1,4,7,3,9,8,5,7,2,6,3,1,5,8,6,3,8,5,2,2,4,3,4,9,6

2) Finding consecutive odd number pairs:
5,1 ✓
1,4
4,7
7,3 ✓
3,9 ✓
9,8
8,5
5,7 ✓
7,2
2,6
6,3
3,1 ✓
1,5 ✓
5,8
8,6
6,3
3,8
8,5
5,2
2,2
2,4
4,3
3,4
4,9
9,6

3) Count of pairs marked with ✓: 6

The answer is (b) 6.