Which of these Walt Disney cartoons premiered first in full feature film length?

Explanation

Walt Disney's 'Snowhite and the Seven Dwarfs 'was the world's first full feature film length cartoon and premiered in 1937. The film about Pinoccio followed in 1940, followed closely by 'Dumbo', in 1941. Disney's film about Bambi was released in 1942, whilst 'Peter Pan' is from 1953. 'The Jungle Book' did not premiere until 1967.