You are given a math word problem and you are supposed to make use of mathematical concepts like probability, combinatorics, linear equations, sequences/series, or simple operators like addition, subtraction, division, or multiplication to answer the given question. Choose the best option from the 5 given options and report that option.

Q: Question: If the average (arithmetic mean) of 18 consecutive odd integers is 414, then the least of these integers is

 Option A: a

 Option B: b

 Option C: c

 Option D: d

 Option E: e

A: Option A
****
Q: Question: A reduction of 20% in the price of salt enables a lady to obtain 10kgs more for Rs.100, find the original price per kg?

 Option A: Rs.2.9

 Option B: Rs.2.1

 Option C: Rs.2.5

 Option D: Rs.2.2

 Option E: Rs.2.7

A: Option C
****
Q: Question: A sells an article to B at a profit of 10% B sells the article back to A at a loss of 10%. In this transaction:

 Option A: A neither losses nor gains

 Option B: A makes a profit of 11%

 Option C: A makes a profit of 20%

 Option D: B loses 20%

 Option E: None of these

A:
Option B
****