**Core Concept:**
The question is asking about a specific clinical manifestation characterized by mutism (loss of speech) and akinesia (lack of voluntary movement). This condition involves preserved consciousness and is often associated with certain neurological disorders. The correct term refers to the combination of motor symptoms and preserved consciousness.

**Why the Correct Answer is Right:**
The correct answer, **Option C: "Akinetic-Mutism"**, refers to a condition where a patient exhibits mutism (inability to speak) and akinesia (lack of voluntary movement), while being conscious and aware of their environment. This condition is commonly observed in patients with severe brain lesions, typically in the subcortical and basal ganglia regions, which are crucial for motor control and speech production.

**Why Each Wrong Option is Incorrect:**

A. **Option A ("Catatonia"):** Although catatonia is characterized by immobility, rigidity, and stereotyped posturing, it involves impaired consciousness or stupor, not preserved awareness.

B. **Option B ("Korsakoff syndrome"):** Korsakoff syndrome is a type of alcohol-related neuropsychological disorder, primarily affecting memory. It does not involve motor deficits or preserved consciousness.

D. **Option D ("Transient global amnesia"):** Transient global amnesia is a temporary episode of memory impairment, with preserved consciousness, but does not present with mutism and akinesia.

**Clinical Pearl:**
Akinetic-Mutism is a rare but crucial clinical entity to recognize in neurology practice, as it may indicate severe subcortical or basal ganglia damage. This condition might guide further diagnostic evaluations and inform treatment decisions, considering the specific underlying pathology causing the symptoms.