The correct option is D (V)
Let's take a look at a few valid cases of arrangement as shown below:
i) J _ K_ C B _ A L
ii) J _ K_ B C_ A L
iii) J _ K_ C _ B A L
If you look closely enough, these cases can be arrived at using all conditions except condition V.
i.e. we have not referred to the statement (V) till now, therefore it is the redundant statement.