Why did the three round table conferences fail in reaching the constitutional settlement​

Third Round Table Conference

So to solve the problem in 1932, the final round of discussion started. Lord Irwin was replaced by Lord Wellington who was not ready to listen to the people and wanted everyone to follow whatever he says. Jinnah was not even invited. Before the conference Ramsay McDonald announced the Communal Award which was surely a huge mistake in its own. It declared Muslim majority in Hindu majority areas while Muslim minority in Muslim majority areas.

The Congress clearly was outraged and boycotted it. the Muslims however were weak and at least it was giving them something so they accepted.These reasons were behind its failure

Explanation:

the hereditary right of a monarch to rule from the mandate of heaven

ok sorry the answer is a. by their religion