Given below are two statements: Statement I: The human immune system is able to differentiate 'self' from 'non-self', which forms the basis of graft rejection. Statement II: The humoral immune response is primarily responsible for the rejection of transplanted organs such as a kidney or heart. In the light of the above statements, choose the most appropriate answer from the options given below:

Step-by-step solution

Statement I is correct because the human immune system has the ability to distinguish between 'self' and 'non-self' tissues, which is the fundamental basis for graft rejection. Statement II is incorrect because the cell-mediated immune response, mediated by T-lymphocytes, is primarily responsible for the rejection of transplanted organs, not the humoral immune response. Answer: Statement I is correct but Statement II is incorrect