Refer to the following number, symbol series and answer the question. Counting to be done from left to right only.
(Left) Ω 9 2 # 1 8 $ 7 3 6 * £ + 5 4 @ % & (Right)
How many such numbers are there each of which is immediately preceded by a symbol and also immediately followed by another symbol?
A3
B5
C2
D4