The correct option is (d) malignant tumours of the skin or mucous membrane.
Explanation:
Carcinoma is a malignant or metastatic tumour. It can extend to the neighbouring cells, this process is called as metastasis. These tumours are generally located in epithelial tissue and glands.
e.g. Breast cancer, skin cancer, stomach cancer, lungs cancer, pancreas cancer, etc.
