Usually with roman numerals, like iron (II) chromate iron has a charge of 2 or manganese (IV) oxide, manganese has a charge of 4 (these are ionic compounds just to let you know)
First of all there nothing exists something like SSA congruence criterion, It is SAS Congruence where the sides of a Triangle and the angle between them is exactly same to the other two sides and angle between them of another triangle.
So the correct option is D.
Explanation:
If the Triangle has two sides equal, so the two angles there are equal. Also the other angle be some other definite angle. So
45+x+x=180(Considering definite angle to be 45) 2x=135 x=67.5