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

Study the following sentences.
$I.$ The cells of malignant tumours divide erratically.
$II.$ They are malignant tumours of epithelial cells.
$III.$ They are malignant tumours of organs that originate from mesoderm.
$IV.$ These tumours are found in organs such as spleen and lymph nodes.
Which of the above are true for angiosarcoma?

Which of the following is $NOT$ true regarding cancer?

What is the name of blood cancer?

Which of the following is known as blood cancer?

How can molecular biology be used for the treatment and detection of cancer?