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: the smallest number which when diminished by 2, is divisible by 12, 16, 18, 21 and 28 is
Options: a. 1008, b. 1010, c. 1022, d. 1032, e. 1043
[EX A]: b

[EX Q]: Problem: the mean of 50 observations is 200. but later he found that there is decrements of 34 from each observations. what is the the updated mean is ?
Options: a. 165, b. 166, c. 190, d. 198, e. 199
[EX A]: b

[EX Q]: Problem: a grocer has a sale of rs. 5435, rs. 5927, rs. 5855, rs. 6230 and rs. 5562 for 5 consecutive months. how much sale must he have in the sixth month so that he gets an average sale of rs. 5500 ?
Options: a. 4991, b. 5991, c. 3991, d. 6542, e. 6995
[EX A]:
c