If the charter study commission shall have recommended that the voters approve one of the optional forms contained in this act, the following question, framed by the commission to conform with its recommendations shall be submitted to the voters:
"Shall the (designating the caption of article 3, 4, 5 or 6) of the Optional County Charter Law be adopted for county, with provision for a board of freeholders of (designating 5, 7 or 9) members elected for (concurrent or nonconcurrent, as the case may be) terms and elected (all at large, or all from 5, 7 or 9 districts) (or with a combination of 2 at large, 3 by districts, or 3 at large, 4 by districts or 4 at large, 5 by districts, as the case may be)?"