$\text{ If }\overrightarrow{x}\text{ and }\overrightarrow{y}\text{ are two non-collinear vectors and }\mathrm{a},\mathrm{b},\mathrm{c}\text{ represent the sides of a }$$\mathrm{△}ABC\text{ satisfying }(\mathrm{a}-\mathrm{b})\overrightarrow{x}+(\mathrm{b}-\mathrm{c})\overrightarrow{y}+(\mathrm{c}-\mathrm{a})(\overrightarrow{x}\times \overrightarrow{y})=0,\text{ then }\mathrm{\Delta }ABC\text{ is: }$

• A

  $\mathrm{an} \mathrm{acute} \mathrm{angle} triangle$

• B

  $an obtuse angle triangle$

• C

  $a right angle triangle$

• D

  $a scalene triangle$