The full form of MLAT is
Modern Language Alertness Test
Modern Language Affective Test
Modern Language Aptitude Test
Modern Language
Modern Language Aptitude Test
The correct option is Modern Language Aptitude Test.
The Modern Language Aptitude Test (MLAT) was designed to measure a person's aptitude, or natural ability, for learning a foreign language. It was developed in the 1950s by John B. Carroll and Stanley Sapon, and it is widely used in government, military, and educational settings to assess how easily and quickly an individual can acquire a new language.