Which of the following elements is isodiapher of ${}_{92}^{235}\text{U}$?

The correct option is D ${}_{90}^{231}\text{Th}$
Isodiaphers : They are the atoms of different element which have the same difference of the number of neutrons & protons.
Here, for both ${}_{92}^{235}\text{U}$ and ${}_{90}^{231}\text{Th}$ $n-p=51$.