Which disease is caused by the activation of oncogenes?

What is melanoma?

............ are useful in destroying cancer tumors.

Which of the following statements is $NOT$ true for retroviruses?

Which of the following diseases is expected to be completely curable in the next two decades?

Malignant tumors are
$I.$ mass of neoplastic cells
$II.$ cells that grow very rapidly and damage the surrounding normal tissue
$III.$ cells that show the property of metastasis
Which of the statements given above are correct?