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: Question: A student gets 60% in one subject, 80% in the other. To get an overall of 75% how much should get in third subject.

Option A: 75%

Option B: 25%

Option C: 85%

Option D: 55%

Option E: 65%

Answer: Option C

Question: Question: A man performs 3/5 of the total journey by rail, 17/20 by bus and the remaining 6.5 km on foot. His total journey is :

Option A: 125 km

Option B: 130 km

Option C: 135 km

Option D: 140 km

Option E: None

Answer: Option B

Question: Question: All of the citizens of a country have a six-character or seven-character national identification code that is created using the 26 letters of the alphabet and the 10 digits from 0 to 9. What is the maximum number of citizens who can be designated with these codes?

Option A: 36^13

Option B: 35(36^7

Option C: 37(36^6

Option D: 35(36^6

Option E: 37(36^7

Answer:
Option C