Final answer:
The provided information states that the diameter of the flat discoloration is larger than 6 mm, which is more than half of a centimeter but does not reach the full centimeter. Therefore, because the provided size exceeds 6 mm, the discoloration is greater than 1 cm (option 3).
Step-by-step explanation:
The question seems to be asking about the size of a flat discoloration, which, based on the provided reference, suggests a melanoma screening context. The reference states that the diameter is larger than 6 mm (0.24 inches). Since 1 cm is equal to 10 mm, any measurement larger than 6 mm but smaller than 10 mm is less than 1 cm. However, if the lesion is larger than 10 mm, it is greater than 1 cm. Considering the given description does not specify an exact measurement, we can deduce that the size of the discoloration is greater than 1 cm, based solely on the 'larger than 6 mm' criterion, which concerns a characteristic of melanoma. Signs such as an evolving shape, oval forms, and lesions with irregular borders or colors also point to the seriousness of such discolorations.
Hence, the answer is option 3.