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.

Question: a, b, c and d are four consecutive numbers. If the sum of a and dis 113, what is the product of b and c?

 Option A: 2652

 Option B: 2578

 Option C: 2534

 Option D: 3192

 Option E: 4234
Option D

Question: If a light flashes every 6 seconds, how many times will it flash in 1/4 of an hour?

 Option A: 51

 Option B: 151

 Option C: 251

 Option D: 351

 Option E: 451
Option B

Question: The average salary of a person for the months of January, February, March and April is Rs.8000 and that for the months February, March, April and May is Rs.8600. If his salary for the month of May is Rs.6500, find his salary for the month of January?

 Option A: s.4100

 Option B: s.4270

 Option C: s.4500

 Option D: s.4550

 Option E: s.2500

Option A