**Core Concept**
The question is testing the understanding of a specific type of hearing loss that is associated with pregnancy and has a familial component. Otosclerosis is a form of bone remodeling disorder that affects the middle ear, leading to conductive hearing loss.

**Why the Correct Answer is Right**
The correct answer is Otosclerosis because it is a condition where there is abnormal bone growth in the middle ear, specifically in the stapes bone, leading to fixation and subsequent conductive hearing loss. The apparent bone conduction hearing loss at 2000 Hz is a characteristic finding in otosclerosis due to the abnormal bone growth affecting the stapes bone, which is responsible for transmitting sound vibrations at this frequency. This condition is also associated with a positive family history and is more common in women.

**Why Each Wrong Option is Incorrect**
* **Option A:** Meniere's disease is a disorder of the inner ear that affects balance and hearing, but it is not typically associated with conductive hearing loss or a positive family history.
* **Option B:** Acoustic neuroma is a type of tumor that affects the nerve connecting the inner ear to the brain, leading to sensorineural hearing loss, which is not consistent with the pure tone audiometry findings in this case.
* **Option C:** Cochlear otosclerosis is a variant of otosclerosis that affects the cochlea, but it is less common and typically presents with sensorineural hearing loss rather than conductive hearing loss.

**Clinical Pearl / High-Yield Fact**
Otosclerosis is more common in women, especially during pregnancy, and is often associated with a positive family history. It is essential to consider this diagnosis in patients with conductive hearing loss, especially when accompanied by a family history of hearing loss.

**Correct Answer:** C. Otosclerosis