If Banana is called Apple, Apple is called Mango and Mango is called Orange, then
which fruit is called king of fruits?
The correct answer should be D (Apple). The question asks which fruit is called the king of fruits (i.e. Mango) and it is clearly shown in the statement that apple is called mango. So, right answer is apple and not orange. For the answer to be 'orange' the question should have read as which fruit is the king of fruits. It is the word 'called' in the question that is creating all the confusion!