Chemotherapy is use of medicine to treat cancer.  
1 1 1
Chemotherapy is the use of chemicals to treat disease, chemotherapy typically refers to the destruction of cancer cells .however chemotherapy also include the use of antiviotics or other medication to treat any illness or infection.
1 5 1
chemotherapy is a "therapy" or "method" which is used to kill the cancer cells but along with destroying the cancer cells it destroys other good cells too.