Six boxes are kept one above the other, such that the box which is at the bottommost position is numbered as 1, the box above it is numbered as 2 and so on. The boxes contains different fruits among Papaya, Pear, Grapes, Apple, Orange and Mango, however not in this particular order. Third box contains Papaya. The box which contains Grapes is kept two boxes above the box which contains Pear. The box which contains Apple is adjacent to the box which contains Grapes. The box which contains Mango is a prime numbered box. How many boxes are there between The box which contains Orange and Apple?