Communication Systems
Assertion (A): In FM the frequency of the carrier is varied by the modulating voltageReason (R): FM and PM are two forms of angle modulation.

Both A and R are correct and R is correct explanation of A
A is wrong but R is correct
A is correct but R is wrong
Both A and R are correct but R is not correct explanation of A

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Communication Systems
In Pulse Code Modulation system

Quantising noise can be overcome by companding
Quantising noise can be reduced by decreasing the number of standard levels
Suffers from the disadvantage of its incompatibly with TDM
Large bandwidth is required

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