In series excitation of a tower antenna _______.

(a) voltage is applied between the upper part of the vertical radiator and tower is insulated from ground
(b) voltage is applied between the lower part of the vertical radiator and tower is insulated from ground
(c) voltage is applied only to the top T conductor and tower is grounded
(d)   voltage is applied only to the top T conductor and tower is insulated from ground

Ans: B