Which of the following conditions is known to cause lesions in the liver of rabbits?

Coccidiosis is a parasitic disease caused by the protozoan Eimeria, which is known to affect the intestines of rabbits primarily, but in severe cases, it can also lead to lesions in the liver. The micro-organisms can cause inflammation and damage to liver tissue, resulting in the formation of lesions. This effect can significantly impact the overall health of the rabbit and may lead to systemic issues if not managed properly. Other conditions listed, while detrimental to rabbit health, do not typically produce lesions in the liver. For instance, myxomatosis affects skin and immune responses, ear mites target the ears and skin, and pneumonia primarily impacts the respiratory system. Thus, the correlation of Coccidiosis with liver lesions makes it the correct choice in this instance.