25) C

A – Wrong
C is not directly connected to X. It first has to go to I and then to X. So, there cannot be a direct line from C to X.

B – Wrong
A is not directly connected to I. It first has to go to C and then to I. So, there cannot be a direct line from A to I.

C – Correct
E is directly connected to G. So, there must be a direct line from E to G.

D – Wrong
F is not directly connected to G. It first has to go to E and then to G. So, there cannot be a direct line from E to G.

E – Wrong
J is not directly connected to X. It first has to go to I and then to X. So, there cannot be a direct line from J to X.

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