Final answer:
Michael Jackson (A) is the pop icon who is sometimes compared to the 'Thriller' character due to perceived features that could resemble hyperthyroidism symptoms. However, there is no confirmed medical diagnosis of hyperthyroidism for Jackson, and these comparisons are speculative based on his appearance changes over time.
Step-by-step explanation:
The pop icon commonly associated with features that some may compare to the 'Thriller' character, due to the condition of hyperthyroidism, is Michael Jackson(A). Hyperthyroidism is a condition in which the thyroid gland is overactive and produces excess thyroid hormones. It can cause a variety of symptoms, including weight loss, rapid heart rate, and bulging eyes (a condition known as Graves' ophthalmopathy), which could lead to comparisons with the appearance of characters in Michael Jackson's famous 'Thriller' music video.
It is important to note, however, that while Michael Jackson's changing appearance over the years has been the subject of much speculation and rumor, there is no confirmed medical diagnosis publicly linking him with hyperthyroidism. These comparisons are more likely based on perceptions of his appearance rather than a medical diagnosis.
Michael Jackson is the pop icon associated with the 'Thriller' character and hyperthyroidism.