Analyze the following statements regarding lexical relations and vocabulary use in English:
I.Phrasal verbs are idiomatic combinations consisting of a verb and a particle (adverb or preposition) that often function as a single semantic unit.
II.Transitive phrasal verbs can be separable, allowing the object to be placed between the verb and the particle, especially when the object is a personal pronoun.
III.Idioms are expressions whose meaning can be easily deduced by the literal sum of the meanings of their individual component words.
Which of the statements above is/are CORRECT?