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.

Input: Consider Input: Problem: the average of first 10 natural numbers is ?
Options: a. 5.6, b. 5.5, c. 5.1, d. 5.8, e. 5.2

Output: b


Input: Consider Input: Problem: a train covers a distance of 100 km in 1 hour. if its speed is decreased by 15 km / hr, the time taken by the car to cover the same distance will be ?
Options: a. 1 hr, b. 1 hr 10 min, c. 50 min, d. 1 hr 30 min, e. 1 hr 45 min

Output: b


Input: Consider Input: Problem: the contents of a certain box consist of 24 oranges and 30 kiwis. how many kiwis must be added to the box so that exactly 30 % of the pieces of fruit in the box will be oranges ?
Options: a. 24, b. 26, c. 30, d. 46, e. 50


Output: b