Okay, here we have this:
Considering the provided triangles, we are going to identify the requested example of an obtuse scalene triangle, so we obtain the following:
Recall that a scalene obtuse triangle is characterized in that one of its angles measures more than 90° and the other 2 measure less than 90°. And all its sides and angles are different.
We can see that option one has all the angles and all the sides equal, that is, since all the angles are equal and their sum is equal to 180°, then each angle measures 60° and does not meet the conditions.
In the second case we see a triangle with 2 equal sides, therefore it can be ruled out because all its sides and angles must be different.
In the third case we observe that it meets all the conditions, since its sides and angles are different, and the upper one measures more than 90 degrees. Therefore this is the correct option.
Finally, in the fourth triangle, none of its angles measure more than 90 degrees, so this option is also incorrect.