Given a math problem with context and a question and 5 answer choices, the task is to provide the correct answer choice based on the problem. You must choose one of the given answer choices by letter: a, b, c, d, or e; anything else is invalid.

[EX Q]: Problem: a car is 15 minutes late by running at a speed of 4 / 5 th of its actual speed. the actual time taken by the car to cover that distance is :
Options: a. 30 minutes, b. 1 hour, c. 2 hours, d. 3 hours, e. none of these
[EX A]: b

[EX Q]: Problem: 2,7, 17,3, 11,19, 5,13, __
Options: a. 20, b. 21, c. 22, d. 23, e. 24
[EX A]: d

[EX Q]: Problem: a jar was full with honey. a person used to draw out 20 % of the honey from the jar and replaced it with sugar solution. he has repeated the same process 4 times and thus there was only 512 gm of honey left in the jar, the rest part of the jar was filled with the sugar solution. the initial amount of honey in the jar was filled with the sugar solution. the initial amount of honey in the jar was :
Options: a. 1.25 kg, b. 1.29 kg, c. 1.85 kg, d. 3.25 kg, e. 1.23 kg
[EX A]:
a