**Question:** Which of the following statements is true regarding Arbo viruses -

A. Arbo viruses cause respiratory infections
B. Arbo viruses are specific to humans
C. Arbo viruses are enveloped RNA viruses
D. Arbo viruses are not associated with neurological complications

**Core Concept:** Arbo viruses are a group of enveloped RNA viruses that cause a range of diseases in humans and animals. These viruses are known to cause arboviral infections, which stands for arboreal virus. Some well-known examples of Arbo viruses include dengue, Zika, West Nile, and yellow fever viruses.

**Why the Correct Answer is Right:**

Correct Answer: C. Arbo viruses are enveloped RNA viruses

Enveloped viruses contain a lipid bilayer envelope derived from the host cell membrane, which is derived from the host's endoplasmic reticulum and Golgi apparatus. This characteristic is shared by all Arbo viruses, making option C the correct answer.

**Why Each Wrong Option is Incorrect:**

A. Arbo viruses cause respiratory infections - While some Arbo viruses, such as the Zika virus, can cause respiratory symptoms, the majority of Arbo viruses primarily affect other organ systems, such as the skin, liver, and nervous system.

B. Arbo viruses are specific to humans - Many Arbo viruses can infect both humans and animals, including mosquitoes, birds, and mammals. Examples include dengue, Zika, and yellow fever viruses.

D. Arbo viruses are not associated with neurological complications - Several Arbo viruses, like Zika and West Nile viruses, have been linked to neurological complications, such as Guillain-Barré syndrome and meningoencephalitis, respectively. This makes option D incorrect.

**Clinical Pearl:** Understanding the characteristics of Arbo viruses is crucial for differential diagnosis and appropriate management of patients presenting with symptoms related to these viruses. Adequate knowledge of the host range, clinical manifestations, and potential complications associated with Arbo viruses can help healthcare professionals in providing appropriate treatment and preventing further spread of these viruses.