In each of the following questions, there is a certain relationship between two given letter pairs on one side of (::) and pair is given on another side of (::) where another pair is to be found from the given alternatives, having the same relationship with this pair as the pairs of the given pair bear. Choose the best alternative.
AB : DC :: CD : ?
Show answer & explanation
Correct answer: A
Explanation
For AB to DC

Similarly,
For CD to?

Option (1) is correct answer.