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.

Input: Consider Input: Question: find two integers, neither of which ends in a zero, and whose product is exactly 10,000

 Option A: 64 and 15,625

 Option B: 60 and 15,625

 Option C: 64 and 15,620

 Option D: 16 and 625

 Option E: 64 and 16,625

Output: Option D


Input: Consider Input: 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

Output: Option C


Input: Consider Input: Question: Find the sum of first 30 natural numbers

 Option A: 470

 Option B: 468

 Option C: 465

 Option D: 463

 Option E: 487


Output: Option C