Discussion

Answer: A

We need to calculate the percentage increase for each option.

• Wheat in 2018: \(\frac{60-45}{45} \times 100 = \frac{15}{45} \times 100 \approx 33.33\)%
• Rice in 2017: \(\frac{40-30}{30} \times 100 = \frac{10}{30} \times 100 \approx 33.33\)%
• Maize in 2019: \(\frac{55-50}{50} \times 100 = 10\)%
• Wheat in 2020: \(\frac{70-65}{65} \times 100 \approx 7.69\)%

Wait, two options are the same. Let's re-calculate Wheat in 2018. It's from 2017's value. 2017 Wheat = 45. 2018 Wheat = 60. Increase is 15. (15/45)*100 = 33.33%. What about Rice in 2017? It is from 2016's value. 2016 Rice = 30. 2017 Rice = 40. Increase is 10. (10/30)*100 = 33.33%. The question is ambiguous or has two correct answers. Let's rephrase the question to be more specific or change a value. Let's change Wheat in 2017 to 40. Then Wheat in 2018 increase is (60-40)/40 = 50%. This would be the clear winner. I'll adjust the data in the direction.