Read the following passage and answer the question that follows.
*Passage:* 'The structural integrity of a building during a fire is a primary concern for firefighting crews.
Buildings are broadly classified into five types of construction.
Type I, Fire-Resistive, uses non-combustible materials like concrete and steel.
Type II, Non-Combustible, also uses non-combustible materials, but with less fire resistance than Type I.
Type III, Ordinary Construction, has non-combustible exterior walls but interior elements (floors, roofs) are made of wood.
Type IV, Heavy Timber, uses large-dimension wood for structural members.
Finally, Type V, Wood-Framed, is the most common residential construction, with nearly all components made of wood.'
According to the passage, which type of construction features non-combustible exterior walls but a combustible wooden interior?