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.

Question: Which of the following statements is true with respect to the alkaloid morphine ?: 
 Options:  <0> It is an isoquinoline alkaloid extracted from straw of Papaver somniferum. <1> It is a benzylisoquinol alkaloid extracted from latex of Papaver somniferum. <2> It is a tracheal alkaloid extracted from leaves of Papaver somniferum. <3> It is a quinolizidine alkaloid extracted from capsules of Papaver somniferum. <4> It is a pyrrolidinic alkaloid extracted from roots of Papaver somniferum.
pharmacology

Question: A patient with an internal arteriovenous fistula in the left arm will recommend: 
 Options:  <0> Put on a compressive bandage for protection. <1> Perform elbow flexion and extension exercises to activate their maturation. <2> Feel the fistula daily to check that it works. <3> Clean the surrounding skin with an antiseptic every day. <4> Lift weight with that hand to achieve vascular remodeling.
nursery

Question: The metal that appears most frequently in the active site of metalloproteases is: 
 Options:  <0> Calcium. <1> Magnesium. <2> Selenium. <3> Sodium. <4> Zinc.

chemistry