The term G and @ is also known as ............ and .......... respectively in the torsion equation $$\frac{T}{J} = \frac{\tau}{R} = \frac{G \theta}{L}$$

A

Young’s modulus, angle of twist

B

Bulk modulus, angle of contact

C

Modulus of rigidity, angular deflection of shaft

D

Shear stress, angle of contact