just realized this is an old question
B and C (I think they are the same)
The triangles are similar, they aren't congruent (identical) though as we don't know if they share a common side
Answer:
2 answers available depending on paranthesis
Step-by-step explanation:
5√2-4√2/√2 = 5√2 - 4
if there is a parenthesis like
(5√2 - 4√2)/√2 = 1√2/√2 =1