Assertion (A) : Ethylene helps the plants to increase their absorption surface.
Reason (R) : It promotes root growth and root hair formation. 

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

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).

A : Ethephon hastens fruit ripening in tomatoes.

R : Ethephon releases ethylene readily.

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

A: 2,4-D is widely used as an herbicide.

R: It is used to kill mature monocotyledonous plants.

Match the Following:

Codes
 

Which one of the following pairs, is not correctly matched?

1. IAA – Cell wall elongation

2. Abscissic acid – Stomatal closure

3. Gibberellic acid – Leaf fall

4. Cytokinin – Cell division

Which one of the following pairs, is not correctly matched?
1. Abscisic acid - Stomatal closure
2. Gibberellic acid - Leaf fall
3. Cytokinin - Cell division
4. IAA - Cell wall elongation