Final answer:
Phosphorous is the very reactive non-metal in the given options. Although Sodium and Potassium are reactive, they are metals. Carbon is a non-metal but it's not as reactive as Phosphorous. Option d is correct.
Step-by-step explanation:
Among the options given, Phosphorous is the very reactive non-metal. Metals like Sodium and Potassium are reactive as well, but they are not non-metals. Carbon, while a non-metal, is not as reactive as Phosphorous. The reactivity of non-metals increases as you move up and to the right of the periodic table, making Phosphorous more reactive than Carbon due to its position.
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