The word "abandon" means to leave behind or give up on something.
The closest synonym among the given options is:
"Disregard" – which also means to ignore or leave something without care or attention.
Thus, the correct answer is (D) "disregard".
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?