If V, U and Vr represent the absolute velocity of fluid, velocity of blade, and relative velocity of fluid, and suffix ‘I’ and ‘o’ stand for entry and exit conditions, then in a rotary machine whose degree of reaction is unity

A. Equal to B. Less than C. More than D. None of these

A. At the base B. At the tip C. In the center D. Between ~ to i of the blade height

A. Higher B. Lower C. Equal D. Can't be compared

A. 200°C B. 500°C C. 700°C D. 1000°C