Theory of Machine
The gear train usually employed in clocks is a

Sun and planet gear
Reverted gear train
Simple gear train
Differential gear

ANSWER DOWNLOAD EXAMIANS APP

Theory of Machine
In a mechanism, the fixed instantaneous centers are those centers which

Remain in the same place for all configurations of the mechanism
Moves as the mechanism moves, but joints are of permanent nature
None of the listed here
Vary with the configuration of the mechanism

ANSWER DOWNLOAD EXAMIANS APP