Explanation:

- Option 1: Andhra Pradesh

Andhra Pradesh is a key state with significant exports, but it did not rank first in the Export Preparedness Index 2020.

- Option 2: Gujarat

Gujarat topped the Export Preparedness Index 2020. The state is known for its strong industrial base and well-developed infrastructure, which contribute significantly to its top ranking.

- Option 3: Telangana

Telangana is emerging as a significant player in exports but did not secure the top spot in the Index.

- Option 4: Maharashtra

Maharashtra has a robust export sector but did not rank first in the 2020 Index.