9, 8, 5,1,31,7,6,5,63,7,7,1,4,6,1,7,5,9,3,1,7,4,4,6,1,7,3,3,7,8,1,7,2

How many 7’s are there in the following sequence, which are immediately preceded by 1 and not immediately followed by 3?
9, 8, 5,1,31,7,6,5,63,7,7,1,4,6,1,7,5,9,3,1,7,4,4,6,1,7,3,3,7,8,1,7,2
(a) 1
(b) 2
(c) 3
(d) 4