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What is the rough opening for the exterior door?

  1. 856 mm x 2084 mm

  2. 860 mm x 2182 mm

  3. 860 mm x 2200 mm

  4. 890 mm x 2190 mm

The correct answer is: 890 mm x 2190 mm

The rough opening for an exterior door is typically larger than the actual size of the door itself. This allows for proper installation and adjustments. Option D (890 mm x 2190 mm) is the largest of the given options, making it the correct answer. Option A is too narrow and may not allow enough space for proper installation. Option B is closer to the correct size, but still slightly too narrow. Option C is too tall, which can lead to a larger gap between the top of the door and the frame. Option D is the best choice as it has enough width and height to accommodate the door's installation.