Who was Indian ruler who built the hanging gardens as a tomb for his wife?

The Hanging Gardens of Babylon were not built as a tomb for a wife. They were constructed in ancient Mesopotamia, not India, and their purpose remains debated by historians. While there's no definitive proof, the most common theory is that the gardens were built by King Nebuchadnezzar II of Babylon for his wife, Amytis, to remind her of her homeland's lush greenery.

It's important to note that the Hanging Gardens are one of the Seven Wonders of the Ancient World and their existence has been questioned by some scholars due to the lack of archaeological evidence.