Assertion (A): The velocity factor of a line is the ratio of wave velocity on the line to speed of light.

Reason (R): If the conductors of a line are immersed in a non magnetic insulating liquid, the wave velocity increases.

1. simple circuitry
2. ability to track and scan simultaneously
3. ability to track many targets together
4. very fast scanning

Assertion (A): When a function f(t) is represented as exponential Fourier series, the set of complex coefficients F_n is called frequency spectrum of f(t)

Reason (R): Frequency spectrum is also called line spectrum.

Match the following:

Assertion (A): In Fortran 77 the statement IMPLICIT INTEGER (A - E) identifies all variable name which begin with A, B, C, D, or E as being of integer type.

Reason (R): IMPICIT statement in Fortran 77 is an improvement over earlier versions of Fortran.