Explanation:

To solve the problem, follow these steps:

- A number is divisible by 3 if the sum of its digits is divisible by 3.

- Calculate the sum of the digits already known, which is 5 + 3 + 0 + 6 + 2 = 16.

- We need to find the digit P such that (16 + P) is divisible by 3.

- Possible values for P could be 2, 5, or 8 since only these make the total divisible by 3.

- The largest value of P is 8 and the smallest is 2.

- Now, find the difference between their squares: $8^2-2^2=64-4=60$.

- Therefore, the correct option is Option:4, 60.