Which of the following is observed in leukemia cancer?

Which of the following statements are correct?
$A.$ Computed tomography and magnetic resonance imaging detect cancers of internal organs.
$B.$ Chemotherapeutic drugs are used to kill non-cancerous cells.
$C.$ $\alpha$-interferon activates the cancer patients' immune system and helps in destroying the tumour.
$D.$ Chemotherapeutic drugs are biological response modifiers.
$E.$ In the case of leukaemia,blood cell counts are decreased.
Choose the correct answer from the options given below:

Hodgkin's disease is:

Which of the following are side effects of anti-cancer drugs?

Which cells are transformed into cancerous cells by retroviruses?

Which one of the following non-infectious diseases is the major cause of death in humans?