Which group of streptococcus grow at > 60degC

**Core Concept**
The question is testing the ability to identify a unique characteristic of a specific group of Streptococcus bacteria. This involves understanding the different species within the genus Streptococcus and their distinct growth requirements.

**Why the Correct Answer is Right**
The correct answer is a group of Streptococcus that can grow at temperatures above 60°C, which is significantly higher than the normal human body temperature of 37°C. This unique characteristic is due to the presence of specific enzymes that allow these bacteria to survive and thrive in high-temperature environments. The correct answer is **Streptococcus thermophilus**, which is a thermophilic bacterium commonly used in the production of yogurt and other fermented dairy products.

**Why Each Wrong Option is Incorrect**
* **Option A:** This option is incorrect because the specific group of Streptococcus that grows at temperatures above 60°C has not been identified.
* **Option B:** This option is incorrect because it does not match the unique growth characteristic of the correct answer.
* **Option C:** This option is incorrect because it is a common species of Streptococcus, but it does not have the ability to grow at temperatures above 60°C.

**Clinical Pearl / High-Yield Fact**
It's essential to remember that different bacteria have unique growth requirements, and understanding these characteristics is crucial for identifying and isolating specific pathogens in clinical settings.

**Correct Answer: C. Streptococcus thermophilus**