H2O
Hb
O2
CO2
Fe
Correct answer is B
Hemoglobin, a protein in red blood cells, is symbolized as Hb.
Which company is known for manufacturing the Galaxy series of smartphones?...
How do you filter unread messages in Telegram?...
Which animated movie features the character Simba?...
Which planet is the smallest in the solar system?...
What is the name of the process by which plants convert sunlight into food?...
How do you find the list of people you’ve blocked on Twitter?...
Which plant is the primary source of opium?...
What was the primary purpose of the Great Wall of China?...
Which financial institution is known as the "Lender of Last Resort"?...