Correct option is C
Given: the letters in the word 'LEUCOMA' is arranged in alphabetical order
The letters in "LEUCOMA" arranged alphabetically are: A, C, E, L , M, O, U.
The 3rd letter from the left is E.
The 2nd letter from the right is O.
Letters between E and O: F, G, H, I, J, K, L, M, N
There are 9 letters between E and O.
Thus, the correct answer is (c)