Task: Question Answering
Input (English): Problem: there is a 5 - digit number. the fifth digit is one fourth of the third digit and one half of the fourth digit. third digit is one half of the first digit. second digit is 5 more than the fifth digit. what is that 5 - digit number ?
Options: a. 86421, b. 86424, c. 89421, d. 96421, e. 76421
Output (English): a