Directions : Study the information carefully and answer the questions given below.
Seven boxes P, Q, R, S, T, U and V are placed one above other in a stack. Each box contains different numbers of pens i.e. 21, 17, 13, 25, 36, 8 and 15. All information is not necessarily in same order. Two boxes are placed between P and U. The number of pens in box U is a prime number. Box R placed just above the box which contain 17 pens. Box V is placed just below box P and contains lowest number of pens. Two boxes are placed between box V and box Q, which contains 36 pens.
Box P contains 8 pens more than box U. Box P does not contain less than 22 pens. Two boxes are placed between box S and box T. Box T contain more numbers of pen than box S. Box Q does not placed just above and just below box S. The number of pens in box Q is perfect square of a number. Box R contains number of pens that is multiple of 5.

Q:

How many boxes are placed between box U and Box S?

• 1
  Two
• 2
  Three
• 3
  Four
• 4
  More than Four
• 5
  None