**Core Concept**
The chorda tympani nerve is a branch of the facial nerve (cranial nerve VII) that carries taste fibers from the anterior two-thirds of the tongue and preganglionic parasympathetic fibers to the submandibular ganglion. It plays a crucial role in taste sensation and salivation.

**Why the Correct Answer is Right**
The chorda tympani nerve originates from the geniculate ganglion of the facial nerve, traverses the middle ear, and enters the infratemporal fossa. It then joins the lingual nerve, a branch of the mandibular division of the trigeminal nerve, and synapses with the submandibular ganglion. The postganglionic fibers from the submandibular ganglion then innervate the submandibular and sublingual glands, stimulating salivation.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because the chorda tympani nerve is indeed responsible for taste sensation from the anterior two-thirds of the tongue. This is a true statement.
**Option B:** This option is incorrect because the chorda tympani nerve does indeed carry preganglionic parasympathetic fibers to the submandibular ganglion. This is a true statement.
**Option C:** This option is incorrect because the chorda tympani nerve does indeed join the lingual nerve to innervate the anterior two-thirds of the tongue. This is a true statement.

**Clinical Pearl / High-Yield Fact**
The chorda tympani nerve is often damaged during middle ear surgery, leading to impaired taste sensation and salivation. This can have significant clinical implications, including difficulty swallowing and feeding.

**Correct Answer:** A