A company wishes to ensure that no one else can use their logo.OptionsIndustrial designsGeographical indicationsPatentTrade mark

To ensure that no one else can use their logo, the company should consider the following options:

1. Industrial Designs: This protects the aesthetic or ornamental aspect of an object. However, it is not the best option for protecting a logo, as logos are more about brand identity than design.

2. Geographical Indications: This is used to protect products that have a specific geographical origin and possess qualities or a reputation due to that origin. This is not relevant for protecting a logo.

3. Patent: Patents protect inventions and new processes. They are not suitable for logos, which are not inventions but rather symbols or designs representing a brand.

4. Trade Mark: This is the most appropriate option for protecting a logo. A trademark is a sign capable of distinguishing the goods or services of one enterprise from those of other enterprises. By registering a trademark, the company can ensure that no one else can legally use their logo.

Conclusion: The company should register their logo as a Trade Mark to ensure that no one else can use it.