Explanation:

- The problem describes six people who like different products and sit in a queue.

- Two persons are between those who like a Shirt and a Necklace.

- The person liking Earrings sits immediately below the one liking Necklace, Uma does not like necklaces.

- Three people separate Sam and the one who likes Shirts.

- Qush sits below Pihu, but above the one liking Pillow; Qush and the Pillow liker are neighbors.

- Two persons separate Sam and Tina. Pihu, liking Candy, is above Tina.

- The Mug liker sits immediately below the person liking Candy.

Let’s deduce the arrangement:

1. Sam likes Shirts.

2. Three between Sam and Shirt implies Sam doesn't like the Shirt; Sam sits between two groups: Necklace-Candy or Candy-Mug.

3. Since Pihu likes Candy, Mug goes below Pihu.

4. Qush is below Pihu but above the Pillow liker, indicating Qush does not like Pillow.

5. Using all above clues, the exact arrangement provides two persons between Rohan and Uma.

Therefore, the answer is Option 5: Two.