Select the option that is related to the fourth term in the same way as the first term is related to the second term

Select the option that is related to the fourth term in the same way as the first term is related to the second term
QMDFEHKNJ: FDMQVJNKH: ? : HELIOPTER
(a) ILEHOERTP
(b) ILEHLRETP
(c) ILEHORETP
(d) LIEHLREPT
Sol: