**Core Concept**
The question tests the knowledge of pharmacological properties of non-depolarizing muscle relaxants, specifically their duration of action. Non-depolarizing muscle relaxants are a class of drugs that compete with acetylcholine for receptors at the neuromuscular junction, thereby inhibiting muscle contraction.

**Why the Correct Answer is Right**
The correct answer is based on the understanding of the pharmacokinetic and pharmacodynamic properties of these drugs. The shortest acting non-depolarizing muscle relaxant is Mivacurium, due to its rapid hydrolysis by plasma cholinesterase.

**Why Each Wrong Option is Incorrect**
**Option A:** Incorrect because it is not specified.
**Option B:** Incorrect because it is not specified.
**Option C:** Incorrect because it is not specified.
**Option D:** Incorrect because it is not specified.

**Clinical Pearl / High-Yield Fact**
Mivacurium is often used for short procedures or when a rapid recovery from muscle relaxation is desired. Its short duration of action makes it an ideal choice for certain clinical scenarios.

**Correct Answer:** Correct Answer: D. Mivacurium.