IDNLearn.com: Where your questions are met with thoughtful and precise answers. Our experts are available to provide accurate, comprehensive answers to help you make informed decisions about any topic or issue you encounter.

Which of the following pairs of constraints contradict each other?
a) 4x + 5y ≤ 75
b) x ≥ 10 2x + 6y ≤ 30
c) y ≥ 3 4x + 5y ≤ 75
d) x ≥ 20 x ≥ 5; y ≥ 10