**Core Concept**
Early congenital syphilis is a condition that occurs when a fetus or newborn is infected with syphilis, a bacterial infection caused by *Treponema pallidum*. This condition is a result of the transmission of the bacteria from the mother to the fetus during pregnancy, often leading to various systemic and congenital abnormalities.

**Why the Correct Answer is Right**
The characteristic feature of early congenital syphilis is the presence of a rash known as "snuffles" or rhinitis, which is often accompanied by other systemic symptoms such as fever, failure to thrive, and hepatosplenomegaly. The rash is typically present on the face, particularly around the nose, and is a result of the infection of the mucous membranes. This is due to the invasion of the bacteria into the respiratory tract, leading to inflammation and the characteristic symptoms.

**Why Each Wrong Option is Incorrect**
**Option A:** This option might be incorrect as it does not specify the correct feature of early congenital syphilis. While it is true that late congenital syphilis may present with different symptoms, such as Hutchinson teeth and saber shin, this is not characteristic of early congenital syphilis.

**Option B:** This option is incorrect as it refers to the symptoms of late congenital syphilis, which occur after the age of 2 years. The characteristic features of late congenital syphilis include Hutchinson teeth, saber shin, and interstitial keratitis.

**Option C:** This option is incorrect as it refers to a symptom that is not specific to congenital syphilis. While respiratory distress can be a symptom of various conditions, it is not a characteristic feature of early congenital syphilis.

**Clinical Pearl / High-Yield Fact**
A key point to remember is that the diagnosis of congenital syphilis is often challenging, and a high index of suspicion is required. The presence of a rash, particularly around the nose, should prompt further investigation and testing for syphilis in both the mother and the newborn.

**Correct Answer: A. Snuffles (rhinitis) is a characteristic feature of early congenital syphilis.**