Specifying the temperature ratio across the normal shock wave will yield which of the following across the normal shock wave?

Specifying the temperature ratio across the normal shock wave will yield which of the following across the normal shock wave? Correct Answer Upstream Mach number

Specifying a dimensionless quantity across the normal shock wave will specify all the other ratios and both the upstream and downstream Mach numbers. But for finding the velocity, temperature also needs to be specified and vice versa.

Related Questions

Statement (I) : When a bluff body moves at supersonic speed in still air, an attached shock wave is produced at its nose causing the flow to be subsonic behind the shock plane. Statement (II) : A normal shock always transforms supersonic flow into subsonic flow causing increase in pressure, temperature and entropy.
The total temperature across the normal shock wave is constant. Which statement gives the wrong reason for this?
For a particular gas, Mach number behind the shock wave is a function of which all parameters ahead of the shock wave. Choose the correct option.