**Core Concept**
General visceral fibres are a type of autonomic nervous system (ANS) fibre that innervate the smooth muscle, cardiac muscle, and glands. They play a crucial role in regulating involuntary functions such as digestion, circulation, respiration, and other visceral functions.

**Why the Correct Answer is Right**
General visceral fibres primarily originate from the central nervous system (CNS) and are part of the autonomic nervous system. They are divided into two main branches: the sympathetic nervous system and the parasympathetic nervous system. The sympathetic nervous system is responsible for the 'fight or flight' response, while the parasympathetic nervous system promotes 'rest and digest' functions. General visceral fibres use acetylcholine as their primary neurotransmitter, except for the sympathetic nervous system, which uses noradrenaline. These fibres supply smooth muscle, cardiac muscle, and glands, but not skeletal muscle.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is not provided, so we will proceed with the other options.
**Option B:** This option is also not provided.
**Option C:** This option is also not provided.
**Option D:** This option is not provided.

**Clinical Pearl / High-Yield Fact**
The autonomic nervous system has a 'dual innervation' of many organs, meaning that both sympathetic and parasympathetic fibres supply the same organ, resulting in complex and opposing effects on the organ's function.

**Correct Answer:**
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