Maithili language was added in eighth schedule by which amendment act?

8th Schedule was added by which Amendment Act?

Tenth schedule was added in constitution by which amendment act?

Which of these Amendment Act added language in 8th schedule of our Constitution?

Which one of the following languages was added to the Eighth Schedule by a Constitutional Amendment in 1967?

Which three languages have been added to the Eighth Schedule of the Constitution by 71st Amendment?