The correct option is
D Nine
1) HI
Number of letters between them in word = 0
Number of letters between them in alphabetical order = 0
2)OP
Number of letters between them in word = 0
Number of letters between them in alphabetical order = 0
3)HP
Number of letters between them in word = 7 (ie H,I,L,O,S,O,P)
Number of letters between them in alphabetical order = 7 (ie I,J,K,L,M,N,O)
4)LO
Number of letters between them in word = 2 (ie O,S)
Number of letters between them in alphabetical order = 2 (ie M,N)
5)LP
Number of letters between them in word = 3 (ie O,S,O)
Number of letters between them in alphabetical order = 3 (ie M,N,O)
6)LS
Number of letters between them in word = 6 (ie O,P,H,I,C,A)
Number of letters between them in alphabetical order = 6 (ie M,N,O,P,Q,R)
7)HI
Number of letters between them in word = 0
Number of letters between them in alphabetical order = 0
8)IL
Number of letters between them in word = 2 (ie C,A)
Number of letters between them in alphabetical order = 2 (ie J,K)
9)HL
Number of letters between them in word = 3 (ie I,C,A)
Number of letters between them in alphabetical order = 3 (ie I,J,K)
Hence the answer is 9 letters