Which of the receptor types might function as a nociceptor?

This question does not have the illustration of the choices. I will attach the choices below. 

The answer would be letter A. Nociceptors are the receptors located at the end of the axon. This receptor responds to a stimulus that might cause or totally damage the body. It sends pain signals to and from the brain and the body, In the choices below letter A is a complete example of a nociceptor.

Eukaryotes are organisms that, similar to humans, have distinguishable forms which are usually quite large. A spider is a eukaryote.