(1) Antenna converts electromagnetic energy into electrical signals when used as a transmitting antenna
(2) Antenna should behave as a resonant circuit
(3) Beam antennas are used for highly directional and low angle radiation.
$\begin{array}{1 1}(a)\;\text{(1) alone}\\(b)\; \text{(1) and (2)}\\(c)\;\text{(3) alone}\\(d)\;\text{all the above}\end{array}$
