Which disease is caused by the activation of oncogenes?

Which technique is used to detect $HIV$ in $AIDS$ patients and to identify mutations in genes of suspected cancer patients?

What is $c-onc$?

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?

$A$ non-infectious,fatal disease caused by the uncontrolled growth of specific body tissues is known as .........

Identify the techniques useful in detecting the cancers of internal organs.