Q. A 23-year-old female presents to the outpatient department complaining of frequent episodes of chest discomfort, particularly during exercise. The discomfort is a heavy, squeezing sensation in the center of her chest, which gets better with rest. She also states that she often becomes breathless with minimal exertion. Her family history is significant for her father who had a heart attack at the age of 28. Physical examination reveals a female of average height and weight. Her vital signs are within normal limits. The cardiovascular examination does not reveal any murmurs. However, her eyes show a grayish ring at the periphery of the cornea. Blood tests reveal a lipid panel with significantly elevated LDL and VLDL cholesterol levels, while her HDL levels are within the normal range. What is the most likely diagnosis in this patient?