Answer:
B
Explanation:
You are given two right triangles PQR and XYZ with PQ=12, PR=6, XY=4, XZ=2. Note that

So, in these triangles:
Hence, by SAS theorem these triangles are similar.
SAS Similarity Theorem states that given two triangles are similar if their two sides are in proportion and their angles adjacent to these sides have the same measure.