Read the following statements

a. Malignant tumours are a mass of non-proliferating neoplastic cells.

b. Malignant tumour starves the normal cells by competing for vital nutrients.

c. Cells of malignant tumours show metastasis.

d. Cells of malignant tumours severely loss the property of contact inhibition.

e. Cells sloughed from benign tumour reach distant sites through blood, where they get lodged to form new tumours. 

In the above, the incorrect statements are