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: In a school of 450 boys, 44% of Muslims, 28% Hindus, 10% Sikhs and the remaining of other communities. How many belonged to the other communities?

 Option A: 72

 Option B: 75

 Option C: 80

 Option D: 81

 Option E: 90
Option D

Question: When p is divided by 9, the remainder is 7. All of the following are possible values of p, except for which of the following?

 Option A: 16

 Option B: 34

 Option C: 52

 Option D: 60

 Option E: 70
Option D

Question: If (2^x)(3^y) = 324, where x and y are positive integers, then (2^x-1)(3^y-2) equals:

 Option A: 16

 Option B: 18

 Option C: 48

 Option D: 96

 Option E: 144

Option B