Final answer:
The M-9 paper is used to detect liquid nerve and blister agents and turns a reddish or pinkish color upon contact, indicating contamination. The color options provided do not include the correct answer, and for detailed results one should refer to the equipment's documentation.
Step-by-step explanation:
The M-9 paper, which is used for detecting the presence of liquid chemical agents, including nerve and blister agents, changes color depending on the type of agent it comes into contact with. The color that M-9 paper turns after coming into contact with a liquid nerve or blister agent is not specified among the options provided (Red, Yellow, Green, Brown). Therefore, without the correct option being listed, it's important to consult the specific detection equipment documentation for accurate information. In real use, for example, the M-9 detection paper is designed to detect the presence of liquid nerve and blister agents by turning a reddish or pinkish color. This color change indicates possible contamination and warns the user of hazardous exposure.