Question

The diameter of stock is more than scion in
A. Tongue grafting
B. Wedge grafting
C. Crown grafting
D. Approach grafting

Answer 1

Hint:
Process of placing a portion of one scion into or on a stem, root, or branch of another stock in such a way that a union will be formed and the partners will continue growing is known as grafting.
The part of the combination that provides the root is called the stock and the added piece is called the scion.

Complete answer:
Grafting is one of the artificial methods of the vegetative propagation.
The scion is an excised part of the desired plant which is grafted to the rooted base of another plant known as the stock.
When the diameter of the stock is more as compared to the diameter of the scion, the used method is called as the crown grafting.

Therefore, the correct answer is option C.

Additional information:
The crown grafting is a method of grafting trees in which the base of at least one scion of a small diameter is inserted under the bark around the stump of a stem or a branch of much larger diameter.
The tongue grafting is one of the oldest methods of asexual plant propagation.
 It is the predominant propagation method used on apples and is widely used on the pear.
Although most of the grapes are grown from cuttings in this country, whip grafting is the standard when they are propagated.
The approach graft is an easy graft to make in the right specialty situations. It takes place naturally in the wild when two branches rub against each other and eventually seal together. We use it to join one whole living plant to another, usually in the garden or greenhouses.

Note:
The process of grafting and budding is horticultural techniques used to join parts from two or more plants so that they appear to grow as a single plant.
 In grafting, scion of one plant grows on the stock of another plant.
 A bud is taken from one plant and grown on another plant in the budding process.