Seven boxes- P, Q, R, S, T, U and V are kept one above the other in the form of the stack. Each box has different items- Pen, Eraser, Colors, Pencil, Scale, Marker and Highlighter but not in the same order. Box Q is kept above the box which has marker. As many boxes are kept above box Q as below box R. The box which has marker is kept three boxes above the box P. The box which has colors is kept immediately above box R. Four boxes are kept between box R and the box which has Highlighter. The number of boxes kept between the box S and box T is one more than the number of boxes kept between box T and the box which has colors. Box V is kept below the box which has Scale but not just below. Box U is kept three boxes above the box which has Eraser. The box which has pen is kept above the box which has Pencil.
Which of the following combinations is correct?

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**Solution:**

1. Let us arrange the boxes from top to bottom as positions 1 to 7.

2. Given that box Q is immediately above the box with Marker, so if Marker is at position x, Q is at position x-1.

3. The number of boxes above Q equals the number of boxes below R. This implies the position of Q and R are symmetric about the middle.

4. The Marker box is three boxes above box P, so if Marker is at position m, P is at position m+3.

5. Colors box is immediately above R, so if R is at position r, Colors is at position r-1.

6. Four boxes are between R and the Highlighter box, so the positions differ by 5.

7. The number of boxes between S and T is one more than the number of boxes between T and Colors.

8. Box V is below Scale but not immediately below.

9. Box U is three boxes above Eraser.

10. Pen is above Pencil.

By logically placing boxes and items according to these clues, the final arrangement from top (position 1) to bottom|

Position (Top to Bottom) | Box | Item |
 |--------------------------|-----|-------------| 
| 1 | Q | Scale |
 | 2 | S | Marker | 
| 3 | P | Colors | 
| 4 | R | Pencil | 
| 5 | U | Highlighter |
 | 6 | T | Eraser | 
| 7 | V | Pen |

(position 7) is:

From this arrangement, the correct combination is:

**Box R contains Pencil.**

**Answer:** (a) Box R - Pencil

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