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: if the price of a certain computer increased 30 percent from b dollars to 351 dollars, then 2 b =
Options: a. 540, b. 570, c. 619, d. 649, e. 700
[EX A]: a

[EX Q]: Problem: if x gets 25 % more than y and y gets 20 % more than z, the share of z out of rs. 1110 will be :
Options: a. rs. 300, b. rs. 200, c. rs. 240, d. rs. 350, e. none of these
[EX A]: a

[EX Q]: Problem: in a kilometer race, if abhishek gives bharti a 40 m start, abhishek wins by 19 sec. but if abhishek gives bharti a 30 sec start, bharti wins by 40 m. find the time taken by bharti to run 5,000 m ?
Options: a. 150 sec, b. 750 sec, c. 450 sec, d. 825 sec, e. none of these
[EX A]:
b