Q. The frictional torque transmitted in a truncated conical pivot bearing, considering uniform wear, is

• (A) 1 2 μWcosecα( r 1 + r 2 )
• (B) 2 3 μWcosecα( r 1 + r 2 )
• (C) 1 2 μWcosecα( r 3 1 − r 3 2 r 2 1 − r 2 2 )
• (D) 2 3 μWcosecα( r 3 1 − r 3 2 r 2 1 − r 2 2 )