To answer this question, we need to determine the pattern used to encode the word "Delhi" as "CCIDD" and apply the same pattern to encode the word "Bombay".
Looking at the word "Delhi" and its encoded form "CCIDD", we can observe that each letter in the word "Delhi" is replaced by the corresponding letter two places ahead in the alphabet.
Applying the same pattern to the word "Bombay", we replace each letter with the corresponding letter two places ahead in the alphabet:
B -> D
o -> q
m -> o
b -> d
a -> c
y -> a
Therefore, the encoded form of "Bombay" is "DMOADC".
None of the provided options match the encoded form "DMOADC", so the correct answer is E) None of these.