What indicates the sequence in which these structures take part in a reflex action?
- Aeffector → motor neurone → relay neurone → sensory neurone → receptor
- Beffector → sensory neurone → motor neurone → relay neurone → receptor
- Creceptor → sensory neurone → relay neurone → motor neurone → effector
- Dreceptor → motor neurone → sensory neurone → relay neurone → effector