Which chemical is sprayed to break the dormancy of buds?

The process of removing seed dormancy by mechanically removing or weakening the seed coat is called:

Why do newly harvested potato tubers not germinate even when placed in favourable conditions?

When the seed coat swells due to the entry of water,the embryo expands,but it remains physiologically dormant. What is this state called?

Based on the following statements,choose the correct option given below.
Statement $I$: Dormancy is a state of metabolic arrest that facilitates the survival of seeds during unfavourable conditions.
Statement $II$: Mature and viable seeds do not germinate even in the presence of favourable conditions unless the dormancy period is completed.

The seed treatment given at low temperatures and moist conditions to break seed dormancy is called ......