The most feared property of malignant tumors are:A Metastasis B Contact inhibition C Apoptosis D Controlled division

Understanding the Question

The question asks to identify the most feared property of malignant tumors from the given options. Malignant tumors are known for certain aggressive behaviors, and we need to evaluate the options accordingly.

Option Analysis

1. Metastasis: This is the process by which cancer cells spread from the primary site to other parts of the body. It is indeed a significant concern because it can lead to the development of secondary tumors and complicate treatment.

2. Contact Inhibition: This refers to the phenomenon where cells stop dividing when they come into contact with each other. Cancerous cells often lose this ability, leading to uncontrolled growth, but it is not the most feared property.

3. Apoptosis: This is a form of programmed cell death. Cancer cells often evade apoptosis, contributing to their survival and proliferation; however, it is not as immediately concerning as metastasis in terms of spread and prognosis.

4. Controlled Division: Typically normal cells undergo regulated division. Malignant tumors exhibit uncontrolled division, but the term "controlled division" implies a normal or desirable state, not a property of malignancy.

Conclusion

The process of metastasis is often the most feared aspect of malignant tumors because it represents the ability of cancer to spread throughout the body, making it more difficult to treat effectively.

Final Answer

A. Metastasis is the most feared property of malignant tumors.