Explanation:

- Excise Duty:

- This is a tax imposed on the manufacture of goods within a country.

- It is included in the price of the product, so the consumer indirectly pays for it.

- Sales Tax:

- This is a tax levied on the sale of goods and services.

- It is typically charged at the point of sale. The buyer pays the tax, and the seller forwards it to the government.

- Custom Duty:

- Levied on goods imported into a country.

- Paid by the importer, but ultimately affects the price for consumers.

- Correct Answer: Option:4 - All of these

- All these taxes are forms of indirect taxes as they are paid by one entity, but ultimately passed on to the consumer.