A : Breaking of seed dormancy by giving cold treatment to seedling in presence of air is vernalisation. 

B : Vernalisation increases vegetative growth period to bring early flowering. 

1. If both Assertion & Reason are true and the reason is the correct explanation of the assertion, then mark(1).

2. If both Assertion & Reason are true but the reason is not the correct explanation of the assertion, then mark (2).

3. If Assertion is true statement but reason is false, then mark (3).

4. If both Assertion and Reason are false statements, then mark (4).

Assertion (A) : Promotion of flowering by a period of low temperature is called vernalisation.
Reason (R) : Vernalisation prevents precocious reproductive development.

1. Both (A) and reason are true and (R) is the correct explanation of (A)
2. Both (A) assertion and (R) are true but (R)is not the correct explanation of (A)
3. (A) is true but (R) is false 
4. Both (A) and (R) are false statements

Consider the following statements:
I. The process of cold treatment that hastens floweringis called vernalisaion. Thus,

   artificial cold treatmentof germinating winter wheat seeds could induce flowering if

    grown  in spring.

II. Vernalisation prepares a plant to flower. It makes the plant perceptive to a stimulus

     but does not function as a stimulus.

III. If vernalisation is followed by high temperature treatment at about 40o C for a

     minimum of 2 days, the vernalisation stimulus is lost. This is known as

     devernalisation.

The correct statements are:

(1) I and II

(2) II and III

(3) I and III

(4) I, II and III