Answer: The correct option is 4th, i.e.,
.
Step-by-step explanation:
It is given that ABC is similar to XYC. If BY = 4, YC = 7, XC = 10.
Draw a diagram by using the given information.
From the figure,



If the two triangles are similar then their corresponding sides are is in proportion and the corresponding angle are same.


Therefore, the correct option is 4th.