The equation for the calculation of torque transmitting capacity in the conical clutch as per uniform wear theory is ________.

A

$$ M_{t} = \frac{\mu P}{4 \sin \alpha}(D + d ) $$

B

$$ M_{t} = \frac{\mu P}{4 \sin \alpha}(D - d ) $$

C

$$ M_{t} = \frac{\mu P}{\sin \alpha}(D - d ) $$

D

$$ M_{t} = \frac{ 2 \mu P}{\sin \alpha}(D - d ) $$