question_answer 23)

  All the following organs in mammals does not one consists of a central 'medullary' region surrounded by a cortical region. (a) ovary                              (b) adrenal                          (c) liver                                 (d) kidney

Answer:

                (c) Liver, the largest gland of body surrounded by the abdominal cavity, is the only organs from the above mentioned options that does not consist of a central 'medullary' region, surrounded by a cortical region. Rest three options, i.e., ovary, adrenal and kidney bear a prominent 'medullary and cortical region'.