To solve this problem, we need to find pairs of letters in the word "CRYSTALLIZE" that have as many letters between them as in the alphabet.

First, let's list down the alphabet:
A, B, C, D, E, F, G, H, I, J, K, L, M, N, O, P, Q, R, S, T, U, V, W, X, Y, Z

Now, let's examine each pair of letters in the word "CRYSTALLIZE" and count the number of letters between them in the alphabet.

1. CR: There are 16 letters between C and R in the alphabet.
2. RY: There is 15 letters between R and Y in the alphabet.
3. ST: There is 16 letters between S and T in the alphabet.
4. TA: There are 19 letters between T and A in the alphabet.
5. AL: There are 7 letters between A and L in the alphabet.
6. LL: There is 8 letters between L and L in the alphabet (counting L itself).
7. LI: There are 10 letters between L and I in the alphabet.
8. IZ: There are 10 letters between I and Z in the alphabet.
9. ZE: There is 19 letters between Z and E in the alphabet.

From the analysis, we can see that there are three pairs of letters in the word "CRYSTALLIZE" that have as many letters between them as in the alphabet: CR, ST, and IZ.

So, the correct answer is (C) 3.