On an X temperature scale, water freezes at `-125.0^(@) X` and boils at `375.0^(@) X`. On a Y temperature scale, water freezes at `-70.0^(@)Y` and boils at `-30.0^(@)Y`. The value of temperature on X-scale equal to the temperature of `50.0^(@)Y` on Y-scale is
A. `455.0^(@)`X
B. `-125.0^(@)`X
C. `1375.0^(@)`X
D. `1500.0^(@)`X