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: 5358 x 71 = ?
Options: a. 273762, b. 283758, c. 383298, d. 273258, e. 380418

Answer: e


Question: Problem: points a, b, c, and d, in that order, lie on a line. if ab = 3 cm, ac = 4 cm, and bd = 8 cm, what is cd, in centimeters ?
Options: a. 7, b. 2, c. 3, d. 4, e. 5

Answer: a


Question: Problem: a shopkeeper gave an additional 20 per cent concession on the reduced price after giving 30 per cent standard concession on an article. if arun bought that article for 1120, what was the original price ?
Options: a. 3000, b. 4000, c. 2400, d. 2000, e. none of these

Answer:
d