Chemicals,which can induce cancer are called

Which of the following methods is primarily used for the diagnosis of cervical cancer?

What type of carcinogens are present in tobacco smoke?

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:

Melanoma cancer of the skin can be classified under which type of cancer?

What is the cancer arising from tissues derived from the mesoderm called?