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.

[EX Q]: Question: Every year an amount increases by 1/8th of itself. How much will it be after two years if its present value is Rs.1600?

 Option A: 3000

 Option B: 4200

 Option C: 2025

 Option D: 1205

 Option E: 3251
[EX A]: Option C

[EX Q]: Question: If |x^2 − 20| = x, which of the following could be the value of x?

 Option A: -5

 Option B: -4

 Option C: 1

 Option D: 4

 Option E: 10
[EX A]: Option D

[EX Q]: Question: How long does a train 105 m long running at the speed of 68 km/hr takes to cross a bridge 90 m length?

 Option A: 13.9 sec

 Option B: 10.7 sec

 Option C: 17.9 sec

 Option D: 61.9 sec

 Option E: 47.98 sec
[EX A]:
Option B