This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Cardiovascular system, Subject name: Pathology
True about pyogenic granuloma are 
Select and explain. 
A. Vascular pathology, B. Bleeds rarely, C. In pregnancy incidence increases, D. 1 and 3
D: 1 and 3
Answer: D: 1 and 3 
Explanation: Pyogenic granulomas are pedunculated masses usually found on the gingiva of children, young adults, and pregnant women. These lesions are richly vascular and typically are ulcerated, which gives them a red to purple color. In some cases, growth can be rapid and raise fear of a malignant neoplasm. However, histologic examination demonstrates a dense proliferation of immature vessels similar to that seen in granulation tissue. Pyogenic granulomas can regress, mature into dense fibrous masses, or develop into a peripheral ossifying fibroma. Complete surgical excision is definitive treatment. (Robbins basic pathology,9th edition,pg no.553)