Correct option is A. The correct structure is A $$O=\overset{O}{\overset{||}{\underset{O}{\underset{||}{Br}}}}-\overset{O}{\overset{||}{\underset{O}{\underset{||}{Br}}}}-\overset{O}{\overset{||}{\underset{O}{\underset{||}{Br}}}}=O$$ Tribromooctaoxide