Refer to the following number, symbol series and answer the question. Counting to be done from left to right only.
(Left) 2 6 # @ 8 $ 7 + 1 * £ 5 & 3 Ω 9 % 4 (Right)
How many such symbols are there each of which is immediately preceded by a number and also immediately followed by another number?
A5
B6
C7
D4