What is metastasis?

Which of the following is the cancerous state of blood?

Melanoma is a type of which cancer?

Hodgkin's disease is:

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:

Ionizing and non-ionizing radiations cause damage to $DNA$ and lead to its transformation into what?