Explanation:

- Normal Goods:

- Follows the law of demand.

- As prices fall, demand increases.

- Consumers buy more when they can afford to.

- Giffen Goods:

- Exceptional case to the law of demand.

- Demand increases as price rises.

- Consumers still buy more due to lack of substitutes and necessity.

- Often inferior goods where income effect dominates substitution effect.

- Inferior Goods:

- Generally follow the law of demand.

- Demand decreases as income rises, leading to less purchase as people can afford better alternatives.

- None of these:

- Not applicable for the context of the law of demand.

Answer: Option 2 - Giffen goods break the law of demand.