Given below are four statements (i-iv) regarding the human blood circulatory system. Choose the option representing the correct statements. (i) Arteries are thick-walled and have narrow lumen as compared to veins (ii) WBCs play a very important role in blood clotting (iii) Persons with blood group AB can donate blood to any person with any blood group under the ABO system (iv) In diseases such as dengue platelet count decreases to a great extent

Given below are four statements (i-iv) regarding the human blood circu

1.	Given below are four statements (i-iv) regarding the human blood circulatory system. Choose the option representing the correct statements. (i) Arteries are thick-walled and have narrow lumen as compared to veins (ii) WBCs play a very important role in blood clotting (iii) Persons with blood group AB can donate blood to any person with any blood group under the ABO system (iv) In diseases such as dengue platelet count decreases to a great extent
Answer» Given below are four statements (i-iv) regarding the human blood circulatory system. Choose the option representing the correct statements. (i) Arteries are thick-walled and have narrow lumen as compared to veins (ii) WBCs play a very important role in blood clotting (iii) Persons with blood group AB can donate blood to any person with any blood group under the ABO system (iv) In diseases such as dengue platelet count decreases to a great extent