Leukemia originates in the .........

Cigarette smoking causes

What type of cancer is cancer of the lymph nodes?

Which genes present in normal cells can transform normal cells into cancerous cells?

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?

Which of the following is $NOT$ a method for the diagnosis of cancer?