Explanation:

Let’s break this down step by step:

- Let's jot down the boxes and chocolates: P, Q, R, S, T, U; chocolates: 119, 175, 190, 210, 250, 280.

- P is immediately above R.

- Three boxes are between R and the 250-chocolate box.

- Box with 175 chocolates is just above the 250-chocolate box.

- There’s one box between T and the 175-chocolate box.

- U has 210 chocolates.

- The 119-chocolate box is below U.

- Three boxes are between S and the 119-chocolate box.

- One box between Q and the 190-chocolate box.

Now, start fitting this together:

- Put P over R, so that’s one pair stacked.

- R is either 4th from top or 4th from bottom (given spacing clues), but keep that in mind.

- 175 is right above 250, and both these are in one pair too.

- U holds 210, and 119 is below U, so U can't be at the bottom.

- T is separated by one box from 175.

After working through all the clues (I did the placements):

- S

- U (210)

- Q

- P

- R (175)

- T (119)

Let’s check the original question:

How many boxes are between box Q and the box with 119 chocolates?

Q is third from the top, and 119 chocolates is at the bottom (T). So between Q (third from top) and T (last), there are exactly two boxes (P and R).

Option:2, two

Here’s the thing:

- Q is above T(119).

- There are exactly two boxes in between.

That’s what the clues add up to, and option 2 is the correct answer.