Indian boxers ______________ won gold medals at the 73rd Strandja Memorial Boxing Tournament, held in Sofia, Bulgaria in February 2022.

The correct option is Nikhat Zareen (52 kg) and Nitu (48 kg).

Explanation:
The 73rd Strandja Memorial Boxing Tournament was held in Sofia, Bulgaria, in February 2022. During this prestigious tournament, Indian women boxers Nikhat Zareen and Nitu Ghanghas showcased outstanding performances:
1. Nikhat Zareen won the gold medal in the women's 52 kg category by defeating Ukraine's Tetiana Kob in the final.
2. Nitu (Nitu Ghanghas) secured the gold medal in the women's 48 kg category by defeating Italy's Erika Prisciandaro in the final.
Therefore, the Indian boxers who won gold medals at the event are Nikhat Zareen (52 kg) and Nitu (48 kg).