Correct Answer: Shortage

Solution : The correct option is the third option.

Deficiency refers to a lack or shortage of something, often a necessary element or quality. Shortage conveys a similar meaning, representing an insufficient quantity or number of something.

The meanings of the other options are as follows:

• Excess means more than what is needed or usual.
• Success is the accomplishment of an aim or purpose.
• Surplus refers to an amount or quantity greater than what is needed or used.

Therefore, the correct answer is shortage.