Explanation

The adult human skull typically has 28 bones. Option A is incorrect because it lists an inaccurate number of bones. Option B is incorrect because it lists an inaccurate number of bones. Option C is incorrect as the actual count is usually 28, making D potentially correct if 28 was an option, but based on standard options, 26 (C) might be intended for a specific context or simplified model, though 28 is generally accepted.