How many such 5s are there in the following number sequence each of which is immediately preceded by 3 or 4 but not immediately followed by 8 or 9 ?

3 5 9 5 4 5 5 3 5 8 4 5 6 7 3 5 7 5 5 4 5 2 3 5 1 0

5

There are 5 such fives in the given sequence that comes after 3 or 4 immediately and is not followed by 8 or 9 immediately.

Thus, 5 is correct option.