Q: 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.
Problem: malar and roja combined will complete a task in 35 days, but malar alone can complete same work in 60 days. calculate in how many days roja can complete this work ?
Options: a. 85 days, b. 45 days, c. 90 days, d. 84 days, e. 95 days
A:
d