Read the passage: 'The Indian Air Force operates in one of the most challenging environments on Earth. From sub-zero temperatures in the Himalayas to scorching desert heat, pilots must adapt to extreme conditions. This demands not just physical fitness but extraordinary mental resilience.'
According to the passage, what does flying in India's diverse geography primarily demand?
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A
Only advanced aircraft technology
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B
Both physical fitness and mental resilience
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C
Long years of theoretical study
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D
Specialized desert survival training alone