Expense costs are not a component of Liquidity Transfer Pricing (LTP). LTP is a method used by financial institutions to allocate the costs and benefits of liquidity across different business lines. It includes several cost components, such as liquidity risk costs, costs of the liquidity cushion, and costs of the liquidity reserves. However, expense costs, which typically refer to the costs incurred in the course of conducting business, such as salaries, utilities, and rent, are not considered a part of LTP. These costs are usually accounted for separately in the financial institution's overall cost structure.

Choice A is incorrect. Liquidity risk costs are a component of Liquidity Transfer Pricing. These costs arise from the uncertainty and potential loss caused by an institution's inability to meet its obligations as they come due without incurring unacceptable losses.

Choice B is incorrect. The costs of the liquidity cushion are also a part of Liquidity Transfer Pricing. The liquidity cushion refers to the liquid assets held by a financial institution to meet unexpected cash flow needs or market disruptions, and maintaining this cushion incurs certain costs.

Choice C is incorrect. The cost of liquidity reserves is another component of Liquidity Transfer Pricing. Financial institutions need to hold certain reserves as per regulatory requirements, which can be costly as these funds could have been otherwise invested for returns.