Q 7 D $ T 3 ! M ^ B 8 5 @ H 2 % A 9 * R 6 E S O 1 K & L # U 4 G ? P

How many such digits are there in the series which are immediately preceded by a letter and immediately followed by a symbol?

The correct option is Three.

To find the total number of digits that meet the given condition, let us carefully analyze the specified sequence from left to right.

Condition to check:
We are looking for a Digit such that:
1. It is immediately preceded by a Letter (Letter → Digit)
2. It is immediately followed by a Symbol (Digit → Symbol)

So, the pattern must be: [Letter] [Digit] [Symbol]

Let us write down the full series and check each digit step-by-step:

Series:
Q 7 D $ T 3 ! M ^ B 8 5 @ H 2 % A 9 * R 6 E S O 1 K & L # U 4 G ? P

Now, let us examine all the digits in the series:

1. Digit 7: Preceded by 'Q' (Letter), but followed by 'D' (Letter). Pattern: Letter-Digit-Letter (Does not match)
2. Digit 3: Preceded by 'T' (Letter) and followed by '!' (Symbol). Pattern: Letter-Digit-Symbol (Match 1: T 3 !)
3. Digit 8: Preceded by 'B' (Letter), but followed by '5' (Digit). Pattern: Letter-Digit-Digit (Does not match)
4. Digit 5: Preceded by '8' (Digit), but followed by '@' (Symbol). Pattern: Digit-Digit-Symbol (Does not match)
5. Digit 2: Preceded by 'H' (Letter) and followed by '%' (Symbol). Pattern: Letter-Digit-Symbol (Match 2: H 2 %)
6. Digit 9: Preceded by 'A' (Letter) and followed by '*' (Symbol). Pattern: Letter-Digit-Symbol (Match 3: A 9 *)
7. Digit 6: Preceded by 'R' (Letter), but followed by 'E' (Letter). Pattern: Letter-Digit-Letter (Does not match)
8. Digit 1: Preceded by 'O' (Letter), but followed by 'K' (Letter). Pattern: Letter-Digit-Letter (Does not match)
9. Digit 4: Preceded by 'U' (Letter), but followed by 'G' (Letter). Pattern: Letter-Digit-Letter (Does not match)

Thus, there are exactly 3 digits (3 in "T 3 !", 2 in "H 2 %", and 9 in "A 9 *") that satisfy the condition.

Therefore, the correct answer is Three.