If FRIEND is coded as HUMJTK, how is CANDLE written in that code ?

Answer: Option C

Explanation:

The letters at the odd positions are moved two steps backward and the letters at even positions are moved two steps forward to get the value.

So PAROLE will be NCPQJG

Answer: Option B

Explanation:

Clearly,

T -1 = S
A -1 = Z
P -1 = O

So FREEZE will be,

F -1 E
R -1 Q
E -1 D
E -1 D
Z -1 Y
E -1 D

Answer: Option A

Explanation:

The first, second, third, fourth, fifth and sixth letters of th word are respectively moved two, three, four, five, six and seven steps forward to obtain the corresponding letters of the code.

So CANDLE will be coded as EDRIRL.

Answer: Option A

Explanation:

Each letter of the word is moved four step back to decode it.
So GEORGE will be CAKNCA

Answer: Option A

Explanation:

Clearly every letter is increased by 1 as
M +1 N
A +1 B
D +1 E
R +1 S
A +1 B
S +1 T

So after increasing every character in work BOMBAY by 1, we get