## **Core Concept**
Genital herpes is a sexually transmitted infection primarily caused by herpes simplex viruses (HSV). There are two main types of HSV: HSV-1, which is commonly associated with oral herpes, and HSV-2, which is more commonly linked to genital herpes. However, both types can cause infections in either location.

## **Why the Correct Answer is Right**
The correct answer, **HSV-2**, is right because this virus is predominantly responsible for genital herpes infections. HSV-2 infects the genital area and causes lesions or sores in that region. The virus is transmitted through skin-to-skin contact during vaginal, anal, or oral sex with an infected person, even if they are not showing symptoms.

## **Why Each Wrong Option is Incorrect**
- **Option A:** This option is incorrect because it does not specify a known cause of genital herpes.
- **Option B:** This option is incorrect because, although HSV-1 can cause genital herpes, it is less commonly associated with this condition compared to HSV-2. HSV-1 is more typically linked to oral herpes.
- **Option C:** This option is incorrect because it implies another unspecified cause.

## **Clinical Pearl / High-Yield Fact**
A key point to remember is that **HSV-2 infections are often recurrent**, and while antiviral medications can help manage symptoms and reduce the frequency of outbreaks, they do not cure the infection. Genital herpes can also increase the risk of acquiring HIV if exposed.

## **Correct Answer:** . HSV-2.