**Core Concept**
The question is testing the student's ability to identify a specific retinal disease characterized by night blindness, tubular vision, and specific fundoscopic findings. This condition is associated with degeneration of the retinal pigment epithelium (RPE) and photoreceptors.

**Why the Correct Answer is Right**
The patient's symptoms and fundoscopic findings are classic for retinitis pigmentosa (RP), a group of genetic disorders affecting the RPE and photoreceptors. The attenuation of arterioles and waxy pallor of the optic disc are indicative of RP. The presence of bony corpuscles like spicules of pigmentation in the mid-peripheral retina is a hallmark of RP. These spicules are formed by the aggregation of pigment from the RPE. The patient's night blindness and tubular vision are also consistent with RP, which is often associated with degeneration of the rod photoreceptors.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is likely a distractor related to another retinal condition, such as diabetic retinopathy or hypertensive retinopathy. However, these conditions do not typically present with the specific fundoscopic findings described in the question.

**Option B:** This option may be tempting, but the patient's symptoms and fundoscopic findings are not consistent with age-related macular degeneration (AMD). AMD typically presents with central vision loss and specific changes in the macula, not the mid-peripheral retina.

**Option C:** This option could be a distractor related to a condition affecting the optic nerve, such as glaucoma. However, the patient's intraocular pressure is within normal limits, and the fundoscopic findings are not consistent with glaucomatous damage.

**Option D:** This option may be a distractor related to a condition affecting the retina, such as retinal detachment. However, the patient's symptoms and fundoscopic findings are not consistent with retinal detachment.

**Clinical Pearl / High-Yield Fact**
Retinitis pigmentosa is a group of genetic disorders affecting the RPE and photoreceptors, leading to night blindness, tubular vision, and specific fundoscopic findings. These conditions are often inherited in an autosomal dominant or recessive pattern and can be associated with other systemic features, such as hearing loss or peripheral neuropathy.

**Correct Answer:** C. Retinitis pigmentosa.