Answer:
(a) The
causes for chronic kidney failure are Problems with the arteries leading to or inside
the kidneys.
(ii) Birth defects of the kidneys (such as polycycstic kidney disease).
(iii) Some pain medications and other drugs.
(iv) Certain toxic chemicals.
(v) Autoimmune disorders.
(vi) Injury or trauma.
(vii) Kidney stones and infection (2)
(b) Doctor refused for the transplant as may be the blood
group of Rohit and his friend did not matched or may be he is suffering from
any disease (i.e., AIDS, autoimmune etc)in which transplantation cannot be
possible. (2)
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