Which one of the following statements is correct?

In malignant tumours, the cells proliferate, grow rapidly and move to other parts of the body to form new tumours. This stage of disease is called:

1. metagenesis 
2. metastasis   
3. teratogenesis     
4. mitosis

The genes causing cancer are called

1. structural genes                         
2. expressor genes
3. oncogenes                               
4. regulatory genes

Which one of the following is not a property of cancerous cells, whereas the remaining three are?

1. They compete with normal cells for vital nutrients

2. They do not remain confined in the area of formation

3. They divide in an uncontrolled manner

4. They show contact inhibition