Which is the longest bone in human body?
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Tibia
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Femur
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Fibula
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Humerus
B
Correct answer
Explanation
The femur (thigh bone) is the longest and strongest bone in the human body, typically about 1/4 of a person's height. It extends from the hip to the knee and supports the body's weight during walking and standing. The tibia and fibula are lower leg bones, while the humerus is the upper arm bone - all significantly shorter than the femur.