Question

which one of these blood types is called the 'universal donor type' because it is compatible with all other blood type?
a)O-positive
b)O-negative
c)A-positive
d)AB-positive

Answer 1

'O-negative' blood type is called as Universal Donor Type.

Short note on 'O-negative':

⇒ A person with O-negative blood group is called as universal donor because his red blood cells can be transfused to any blood group person.

(or)

O-negative blood type is called as universal donor type because they can donate blood to everyone.

⇒ A person with 'O- negative' blood can receive only 'O-negative' blood.

⇒ It do not contain any antigens in their Red blood cells.

⇒ In the plasma both antibodies A an B are present.

⇒ Approximately 7% of the population have 'O-negative' blood.

Hope it helps!

Answer 2

Here is your answer -

It's Option "B"

$\bold{O \: NEGATIVE}$

About O - Negative

O - Negative blood type is known as the "Universal Donor Type" as it is compatible with any blood type.

"O Negative" blood can be donated to anyone and very useful while in emergency .

O Negative blood cells are called "universal" which mean they can transfused to almost any patient in need .

Those who are with O Negative can only receive blood from other O Negative donor .

O Negative red blood cells are safe for new born babies with under developed immune system .

1 in 15 people have O Negative blood (approximately 6.6% of the population)