Which of the following is not a storage root?

Options

A. Tap root of carrot
B. Tap root of turnip
C. Adventitious root of sweet potato
D. Roots of banyan tree

Explanation

To determine which of the following is not a storage root, we need to analyze each option provided:

1. **Tap root of carrot**:
- Carrots have a tap root that is modified for storage. This root stores nutrients and energy in the form of carbohydrates, making it a storage root.

2. **Tap root of turnip**:
- Similar to carrots, turnips also have a tap root that is modified for storage. The tap root of turnip serves the same purpose of storing food, thus it is also a storage root.

3. **Advantageous root of sweet potato**:
- Sweet potatoes have advantageous roots that are modified for storage. These roots store starch and other nutrients, making them storage roots as well.

4. **Roots of banyan tree**:
- Banyan trees have aerial roots, which are primarily known as prop roots. These roots do not serve the function of storage; instead, they provide structural support to the tree, helping it to stand upright and stabilize its large canopy.

Based on this analysis, the option that is **not a storage root** is the **roots of the banyan tree**.

### Final Answer:
**Roots of banyan tree** is not a storage root.

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