This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Respiratory system, Subject name: Pathology
Which of the following is not true about Bronchoalveolar carcinoma - 
Select and explain. 
A. Adenocarcinoma, B. Stromal invasion with desmoplasia, C. Preservation of alveolar structure, D. Grows along pre-existing anatomical structures
B: Stromal invasion with desmoplasia
Answer: B: Stromal invasion with desmoplasia 
Explanation: Ref:Textbook of pathology (Harsh mohan) 6th edition,page no.501 Bronchiolo-alveolar carcinoma is characterised by cuboidal to tall columnar and mucus-secreting epithelial cells growing along the existing alveoli and forming numerous papillary structures . Ultrastructurally, these tumour cells resemble Clara cells or less often type II pneumocytes. it is a type of adenocarcinoma.Thre is preservation of alveolar structure and grows along pre-existing anatomical structures.