Refer to the following number and symbol series and answer the question that follows. Counting to be done from left to right only.
(Left) 9 # 1 *$$\mathcal{L}$$​ 2 & % 4 @ 6 8 $ 7 & 3 $$\Omega$$​ 5 (Right)
How many such numbers are there, each of which is immediately preceded by a number and also immediately followed by a symbol?

Given: (Left) 9 # 1 *$$\mathcal{L}$$​​ 2 & % 4 @ 6 8 $ 7 & 3 $$\Omega$$​​ 5 (Right)

Logic: Numbers | Numbers | Symbols 

so, there are only 1 number which is following the same logic.

Thus, the correct option is (d) One.