Pen : Pencil : Rubber — Choose the option that is in the same stationery/school-supplies category as the given trio.

Introduction / Context:
Pen, pencil, and rubber (eraser) are items of stationery used for writing and correction. We must select another stationery/school-supply item from the options.

Given Data / Assumptions:

• The category is stationery/learning materials.
• Options include inanimate household/electronic items and one stationery item.
• We must maintain the domain of writing/recording tools or materials.

Concept / Approach:
'Page' (sheet of paper) is a stationery component used with pens/pencils/erasers and fits the category. 'Cell' (battery), 'pillow', and 'TV' are not stationery items.

Step-by-Step Solution:
1) Identify category: stationery/school supplies.2) Select the option within this category.3) Choose 'Page'.

Verification / Alternative check:
Stationery sets routinely include paper/pages alongside pens and pencils, confirming the match.

Why Other Options Are Wrong:

• Cell/Pillow/TV: Not stationery; domain mismatch.
• None of these: Incorrect because 'Page' fits.

Common Pitfalls:
Overlooking that 'rubber' here means eraser; keep the stationery context.

Final Answer:
Page