**Core Concept**
A mobile tumour on the vocal cord is a type of laryngeal neoplasm that requires prompt management to preserve voice quality and prevent airway compromise. The primary goal of treatment is to remove the tumour while minimizing damage to the surrounding vocal cord tissue.

**Why the Correct Answer is Right**
The treatment of choice for a mobile tumour on the vocal cord is **vocal cord stripping** or **microsurgical excision**, which involves the removal of the affected mucosa layer. This approach is preferred as it allows for the preservation of the vocal cord's intrinsic muscle and nerve supply, thereby maintaining optimal voice function. The procedure is typically performed under general anesthesia or local anesthesia with sedation, and may be done via microlaryngoscopy.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect as it does not specify the type of treatment, which is crucial for a mobile tumour on the vocal cord.
**Option B:** This option is incorrect as it is a more aggressive approach, typically reserved for larger or more invasive tumours.
**Option C:** This option is incorrect as it is a conservative approach, often used for smaller lesions or those that are not causing significant symptoms.

**Clinical Pearl / High-Yield Fact**
It's essential to differentiate between mobile and fixed vocal cord tumours, as the latter may require more aggressive treatment, such as radiation therapy or more extensive surgery, to address potential airway obstruction.

**Correct Answer:** B. Vocal cord stripping or microsurgical excision.