Explanation:

Option A and C: Approved vaccines exist for both. Option D: It is a bacterial disease. Option B: Chikungunya disease resembles dengue fever, and is characterized by severe, sometimes persistent, joint pain (arthiritis), as well as fever and rash. It is rarely life-threatening.
Chikungunya occurs in Africa, India and Southeast Asia .
he states in India affected by chikungunya are Andhra Pradesh, Karnataka, Maharasthra, Madhya Pradesh, Tamil Nadu, Gujarat & Kerala.

Anyone who is bitten by an infected mosquito can get chikungunya.
There is neither chikungunya virus vaccine nor drugs are available to cure the infection. However, there are some recent attempts at developing the vaccine; they haven’t been approved by WHO.
Prevention, therefore, centers on avoiding mosquito bites. Eliminating mosquito breeding sites is another key prevention measure.