Povijest - 2020./21. ljeto - 56.

A. automobil $\to \backslash rightarrow$ x-zrake $\to \backslash rightarrow$ zrakoplov $\to \backslash rightarrow$ telefon

B. telefon $\to \backslash rightarrow$ automobil $\to \backslash rightarrow$ x-zrake $\to \backslash rightarrow$ zrakoplov

C. x-zrake $\to \backslash rightarrow$ telefon $\to \backslash rightarrow$ automobil $\to \backslash rightarrow$ zrakoplov

D. telefon $\to \backslash rightarrow$ x-zrake $\to \backslash rightarrow$ automobil $\to \backslash rightarrow$ zrakoplov