## Core Concept
The concept of conditioned reflex refers to a type of learning in which a neutral stimulus becomes associated with an unconditioned stimulus to elicit an unconditioned response. This fundamental principle in behavioral psychology involves the association of a previously neutral stimulus with a stimulus that naturally elicits a response. The conditioned reflex is a cornerstone in understanding learning and behavior.

## Why the Correct Answer is Right
Ivan Pavlov, a Russian physiologist, is renowned for his work on conditioned reflexes. Through his experiments with dogs, Pavlov demonstrated that a neutral stimulus (e.g., the sound of a bell) could be paired with an unconditioned stimulus (e.g., food) to eventually elicit a conditioned response (salivation at the sound of the bell alone). Pavlov's work laid the foundation for classical conditioning, a type of learning that involves associating an initially neutral stimulus with a stimulus that naturally elicits a response.

## Why Each Wrong Option is Incorrect
* **Option A:** Although not provided, any incorrect option would not accurately reflect the individual known for describing conditioned reflex.
* **Option B:** Similarly, without specifics, any other option besides Pavlov would not be credited with the discovery or detailed explanation of conditioned reflexes.
* **Option C:** This option, like others, would be incorrect if it does not correspond to Ivan Pavlov.

## Clinical Pearl / High-Yield Fact
A key point to remember is that **classical conditioning**, as described by Pavlov, is a critical concept in psychology and medicine, illustrating how associations can lead to learned behaviors. This principle has implications in various fields, including psychology, psychiatry, and even marketing.

## Correct Answer Line
**Correct Answer: C. Ivan Pavlov**