music: what u.s. state was used for the location shots for the 1955 hit musical oklahoma?

Questions

What flower produces pink and white flowers in alkaline soil?

What fluid lubricates the eye?

What food was almost non-existent in ireland in the 1840's?

What form of horse racing boasts the Little Brown Jug?

What form of racial segregation was introduced in south africa in 1948?