instruction:
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.
question:
Problem: a 16 % stock yielding 10 % is quoted at :
Options: a. 83.33, b. 110, c. 112, d. 120, e. 160
answer:
e


question:
Problem: excluding the stoppages, the speed of a bus is 48 km / hr and including the stoppages the speed of the bus is 12 km / hr. for how many minutes does the bus stop per hour ?
Options: a. 45 min, b. 10 min, c. 12 min, d. 20 min, e. 18 min
answer:
a


question:
Problem: a jar contains a mixture of ab in the ratio 4: 1. when 40 l of mixture is replaced with liquid b, ratio becomes 2: 3. how many liters of liquid a was present in mixture initially.
Options: a. 12, b. 15, c. 16, d. 64, e. 25
answer:

d