Arrange the given words Alphabetical Order and choose the one that comes first.

A. QUALIFY

Choose or find odd pair of words - (Jupiter : Planet) , (Musician : Artist) , (Merchant : Business) , (Maize : Cereal)

C. MERCHANT : BUSINESS

Choose or find odd pair of words - (Oil : Lamp) , (Water : Tap) , (Oxygen : Life) , (Power : Machine)

B. WATER : TAP

Choose or find odd letter group - BdE , XpD , HQu , MkV , PtZ

A. HQU

In a certain code, 15789 is written as AXBTC, 2346 is written as MPDU. How is 23549 written in that code ?

D. MPXDC