Classification – Odd one out (plant part eaten): Select the item that does not match the others based on which part of the plant is commonly eaten: Radish, Carrot, Garlic, Gourd.

Introduction / Context:
Odd-one-out questions often rely on a single clear attribute. Here, the four food items can be grouped by the botanical part we commonly eat. Three are underground storage organs (roots/bulb), while one is an above-ground fruit.

Given Data / Assumptions:

• Radish: edible taproot.
• Carrot: edible taproot.
• Garlic: edible bulb (modified underground stem with cloves).
• Gourd: edible fruit of various cucurbit plants (above ground).

Concept / Approach:
Classify by plant part: root, bulb, stem, leaf, flower, or fruit. A single member that is not an underground organ becomes the outlier.

Step-by-Step Solution:
Radish → root (underground).Carrot → root (underground).Garlic → bulb (underground).Gourd → fruit (above-ground vine produce).

Verification / Alternative check:
Even across cuisines, radish and carrot are roots, garlic is a bulb; gourd families (bottle, bitter, ridge, etc.) are fruits borne on vines. Thus gourd uniquely differs by plant part and growth location.

Why Other Options Are Wrong:

• Radish, Carrot, and Garlic all come from underground organs used for storage by the plant.

Common Pitfalls:
Confusing culinary usage with botany; “vegetable” is culinary, but plant part (root/bulb/fruit) is botanical and provides the precise distinction needed.

Final Answer:
Gourd