The correct option is A eye
The opening sentence says that Yogeshwar almost lost one of his legs due to a knee injury. The 16th sentence says his back injury was a problem but he got over it. The passage does not mention a head injury. The 8th sentence says that he had problems seeing due to the injury. The passage doesn't say anything about the effects the eye injury had on his performance. So, the only injury that didn't cause trouble is the eye injury. Hence, A is correct.