Read the following passage and answer the following question.
Cancer is one of the most dreaded diseases of human beings and is a major cause of death all over the globe. More than a million Indians suffer from cancer and a large number of them die from it annually. The mechanisms that underlie development of cancer or oncogenic transformation of cells, its treatment and control have been some of the most intense areas of research in biology and medicine. . Normal cells show a property called contact inhibition by virtue of which contact with other cells inhibits their uncontrolled growth. Cancer cells appears to have lost this property. As a result of this, cancerous cells just continue to divide giving rise to masses of cells called tumors. Transformation of normal cells into cancerous cells may be induced by carcinogens. Radiations cause DNA damage leading to neoplastic transformation.Cancer causing viruses called oncogenic viruses have genes called viral oncogenes. Cancer detection is based on biopsy and histopathological studies of the tissue and blood and bone marrow tests for increased cell counts in the case of leukemias. Techniques like radiography, CT and MRI are very useful to detect cancers of the internal organs. The common approaches for treatment of cancer are surgery, radiation therapy and immunotherapy.

What is the other name for the mass of proliferating cells in malignant tumors?(Question 4)

Neoplastic cells

The correct answer is Option (3) –Neoplastic cells

The mass of proliferating cells in malignant tumors is referred to as neoplastic cells. "Neoplastic" refers to the process of neoplasia, which is the abnormal growth of cells, typically associated with cancer. These cells grow very rapidly, invading and damaging the surrounding normal tissues.

Benign tumors normally remain confined to their original location and do not spread to other parts of the body and cause little damage.