Which of the following leases is applicable ONLY to a commercial property?

A gross lease is a common arrangement in both residential and commercial properties where the landlord covers property expenses like maintenance and taxes. This type of lease does not inherently apply exclusively to commercial real estate, as it can also be found in residential agreements, making it unsuitable for this question's criteria.

A variable lease, often called a fluctuating lease, typically allows for changes in rent over time based on a predetermined formula or market conditions. This lease type can be utilized in both commercial and residential contexts, as it does not restrict its applicability to commercial properties alone, thus failing to meet the question's requirement.

A lease purchase agreement provides tenants the option to buy the property at the end of the lease term. This type of agreement can apply to both residential and commercial properties, as it is not limited to commercial contexts. Therefore, it does not satisfy the exclusivity requirement specified in the question.