In the following number sequence, how many such even numbers are there which are exactly divisible by its immediate preceding number but not exactly divisible by its immediate following number ?
3  8  4  1  5  7  2  8  3  4  8  9  3  9  4  2  1  5  8  2

Answer: B. Two

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