Grafting is the union between two plants of closely related varieties. Following are some statements regarding different types of grafting.
(i) An oblique cut followed by a notch is given to both stock and scion.
(ii) Scion is a bud with a small piece of bark and cambium.
(iii) Both stock and scion are of same diameter.
(iv) Stock has many times more diameter than scion.
Identify the type of grafting with respect to these statements and select the correct option.

Options

A. can be tongue grafting in which diameter of stock is larger than that of scion.
B. can be bud grafting in which stock of monocot and scion of dicot plant are usually united.
C. can be wedge grafting in which v-shaped notch is given to stock whereas wedge like cut is given to scion.
D. can be crown grafting in which many stocks are inserted in the slits made in the scions.

Explanation

To solve the question regarding the type of grafting based on the provided statements, we will analyze each statement step by step.

### Step-by-Step Solution:

1. **Understanding Grafting**:
- Grafting is a horticultural technique that involves joining two plants together so they can grow as one. The part of the plant that is grafted onto the root system is called the scion, while the plant that provides the root system is called the stock.

2. **Analyzing Statement (i)**:
- "An oblique cut followed by a notch is given to both stock and scion."
- This statement describes a method used in **tongue grafting**, where both the stock and scion are cut at an angle to create a tongue-like shape that fits together.

3. **Analyzing Statement (ii)**:
- "Scion is a bud with a small piece of bark and cambium."
- This statement is generally true for many grafting methods, particularly **budding**, where a bud is taken from one plant and grafted onto another. However, it does not specify a particular type of grafting.

4. **Analyzing Statement (iii)**:
- "Both stock and scion are of the same diameter."
- This statement is characteristic of **wedge grafting**. In wedge grafting, both parts are of similar size to ensure a good fit.

5. **Analyzing Statement (iv)**:
- "Stock has many times more diameter than scion."
- This statement describes **crown grafting**, where the stock is significantly thicker than the scion, allowing for multiple scions to be inserted into the stock.

6. **Conclusion**:
- Based on the analysis:
- Statement (i) corresponds to **tongue grafting**.
- Statement (ii) aligns with **budding**.
- Statement (iii) is indicative of **wedge grafting**.
- Statement (iv) refers to **crown grafting**.
- Therefore, the correct type of grafting that matches the statements is **crown grafting** (option D), as it is the only one that describes the relationship of stock and scion diameters accurately.

### Final Answer:
The correct type of grafting based on the statements provided is **crown grafting** (option D).