Melanoma is a type of which cancer?

Which of the following is responsible for causing leukemia?

$X$ - Chemical carcinogens are responsible for lung cancer.
$Y$ - Strong magnetic field is used in $CT-SCAN$ to diagnose cancer.

Characteristics of cancer are

$A$ benign tumour is one which:

Select the true statements.
$I.$ Cancer can be detected by the use of antibodies against cancer-specific antigens for certain types of cancer.
$II.$ The tumor cells are surgically removed to reduce the load of cancerous cells.
$III.$ Certain chemotherapeutic drugs are used to kill the cancerous cells,but the majority of the drugs have side effects like hair loss,anaemia,etc.