The most critical adverse effects of chemotherapy and radiation threapy include:?

[blovel2007]

a. thrombocytopenia and leukopenia
b. headache and lethargy
c. nausea and constipation
d. alopecia and weight loss

[Nice_Huh?]

Critical?, maybe A. becuase both of these can cause uncontrolled/abnormal bleeding,which could cause a brain hemmorhage because the platelets needed to clot the blood are low.....but all of these occur during chemo.