mental ability

How many even numbers are there is the above sequence which are immediately preceded by an odd
number and immediately followed by an even number ?
5 1 4 7 3 9 8 5 7 2 63 1 5 8 6 3 8 5 2 2 4 3 4 9 6
(A) 1 (B) 2 (C) 3 (D) 4