Answer : 1. "Saudi Arabia"
Explanation :

India-Saudi Arabia Investment Forum 2023 was organized in New Delhi. This is the first formal investment symposium between the two countries. More than 500 companies from both the countries participated in this program. The Saudi Crown Prince had announced investments worth about $100 billion in various sectors of the Indian economy. More than 45 MoUs were also signed at the forum, which aims to deepen economic engagement and promote investment flows.