Explanation:
The symbol for antimony is Sb.
It is given that formula name include trichloride this means that there are three chlorine atoms attached to antimony.
When antimony reacts with chlorine then it results in the formation of antinomy trichloride. The reaction will be as follows.
[tex]Sb + 3Cl \rightarrow SbCl_{3}[/tex]
Thus, we can conclude that the formula which correctly represents antinomy trichloride is [tex]SbCl_{3}[/tex].