What was the name of the state created after the abolition of the parliamentary board and the establishment of the royal dictatorship in 1929? a)...

The answer is a), Yugoslavia.

In 1929, King Alexander I of Yugoslavia abolished the parliamentary board and established a royal dictatorship. He renamed the country Yugoslavia, which means "Land of the South Slavs." The name change was intended to promote unity among the different ethnic groups in the country.

The royal dictatorship lasted until 1934, when King Alexander was assassinated. After his death, the country returned to a parliamentary system. However, the country was still divided by ethnic tensions, and it eventually broke up into several smaller countries after World War II.