Through their effect on plant growth regulators, what do the temperature and light control in the plants ?

1. Flowering 

2. Closure of stomata

3. Fruit elongation 

4. Apical dominance 

Vernalisation stimulates flowering in -
1. Turmeric
2. Carrot
3. Ginger
4. Zaminkand

Treatment of seed at low temperature under moist conditions to break its dormancy is called :

1. sacrification

2. vernalization

3. chelation

4. stratification