<prompt> Please answer with one of the option in the bracket. Write reasoning in between . Write answer in between .Q:A 5-year-old girl presents to the emergency room with acute airway obstruction. Physical examination shows cough, episodic wheezing, and excess mucus production. Increased quantities of which of the following would predispose the child to extrinsic asthma:? A: Treg lymphocytes, B: Th17 lymphocytes, C: Th1 lymphocytes, D: Th2 lymphocytes, E: Kupffer cells,  <response>: This is a question about the immunological factors involved in asthma pathogenesis. The stem describes a child with symptoms of an acute asthma exacerbation, including wheezing, coughing, and excess mucus production. The question asks which type of immune cell, when present in increased quantities, would predispose the child to extrinsic allergic asthma. Th2 lymphocytes are a subset of T helper cells that drive type 2 immune responses, which are associated with allergic diseases like asthma. Th2 cells secrete cytokines like IL-4, IL-5, and IL-13 that promote IgE production, eosinophil activation, and mucus production. In contrast, Th1 cells promote cell-mediated immunity against intracellular pathogens, not allergic responses. Treg cells suppress immune responses and inflammation. Th17 cells are involved in autoimmunity. Kupffer cells are macrophages in the liver, not relevant to asthma immunopathology.D: Th2 lymphocytes 