**Core Concept**
The most reliable method of identification of an individual involves analyzing unique characteristics that are difficult to alter or replicate. In forensic science, this often involves comparing physical or biological traits to establish a match.

**Why the Correct Answer is Right**
The correct answer is based on the principle of uniqueness and stability of human DNA. Deoxyribonucleic acid (DNA) is a molecule that contains the genetic instructions used in the development and function of all living organisms. DNA is composed of two complementary strands that are twisted together in a double helix structure. The sequence of nucleotides in DNA is unique to each individual, making it an ideal candidate for identification purposes. DNA profiling, also known as genetic fingerprinting, involves analyzing specific segments of DNA to create a unique profile that can be used to match an individual.

**Why Each Wrong Option is Incorrect**
**Option A:** Fingerprints are unique to each individual and can be used for identification purposes, but they are not the most reliable method due to the possibility of alteration or destruction.
**Option B:** Iris scans are a form of biometric identification, but they are not as reliable as DNA profiling due to the potential for error or tampering.
**Option C:** Voice recognition is a form of biometric identification, but it is not as reliable as DNA profiling due to the possibility of mimicry or alteration.

**Clinical Pearl / High-Yield Fact**
DNA profiling is considered the gold standard for identification purposes due to its uniqueness and stability.

**Correct Answer: C. Deoxyribonucleic acid (DNA) profiling.**