Lexico-grammar involves the interdependence of vocabulary and syntax, often manifesting in fixed or semi-fixed expressions known as binomials. Analyze the following assertions regarding irreversible binomials and their semantic or phonological constraints:
I. In the expression "odds and ends," the word order is fixed and cannot be reversed to "ends and odds" without losing idiomaticity.
II. The expression "back and forth" implies a movement, whereas "forth and back" is the standard form used in formal British English.
III. Reversing binomials like "bread and butter" to "butter and bread" is grammatically incorrect and disrupts the semantic unity.
Select the correct analysis: