We have to find the name of the angle. S is the angle here. So to find the name we have to write S in the middle of two alphabets. Like here, we can name the angle, ∠TSU, but it is not in the options. We can name it also ∠TSV, which is also not given. We can name it ∠RSU, which is also not in the options. We can name it, ∠RSV also which is given in the options.
So we have got the answer. Correct name for the angle is ∠RSV.
Option B is correct here.