Detailed Explanation:

Answer: Option 3 — Both 1 and 2

✅ Statement 1 – Correct: Zika virus is primarily transmitted by the Aedes aegypti mosquito in tropical regions. This is the same mosquito species that transmits dengue, chikungunya, and yellow fever. The mosquito becomes infected when it bites an infected person and can then transmit the virus to other people through subsequent bites.

✅ Statement 2 – Correct: Sexual transmission of Zika virus is well-documented and possible. The virus can be transmitted through vaginal, anal, and oral sex. It can persist in semen for several months, making sexual transmission a significant route of infection even in areas without active mosquito transmission. Pregnant women are particularly at risk as Zika can cause severe birth defects.

Therefore, both statements are correct.