In this task, you are given a question and answer options for that question. Using this information, you have to classify each text into different topics: medicine, nursery, psychology, chemistry, pharmacology, biology.

Input: Consider Input: Question: The anatomical dead space: 
 Options:  <0> It is always greater than the physiological one. <1> Secret surfactants. <2> Includes medium-sized bronchioles. <3> It allows gaseous exchange. <4> Includes the volume of inspiratory reserve.

Output: biology


Input: Consider Input: Question: Why is the presence of lentigo in older people? 
 Options:  <0> Cell dehydration <1> Small hemorrhages due to capillary fragility. <2> Hyperplasia of intraepidermal melanocytes. <3> Deficiency of collagen and elastin. <4> Lipofuscin deposits.

Output: nursery


Input: Consider Input: Question: In smooth muscle fibers: 
 Options:  <0> The functional unit is the sarcomere. <1> The contraction is regulated by troponin. <2> The autonomous system always innervates all fibers. <3> Actinamyosin cross bridges do not form. <4> There may be hormone receptors.


Output: biology