The word "legible" means something that is clear enough to read. The correct synonym for "legible" in this context is "readable" (Option D).
Thus, the correct synonym is "readable," making the sentence: "Her handwriting is barely readable."
Arun’s present age in years is 40% of Barun’s. In another few years, Arun’s age will be half of Barun’s. By what percentage will Barun’s age increase during this period?