Biology
Which among the following carries impure blood to human heart?

Pulmonary vein
Pulmonary arteries
Aorta
Vena Cava

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Biology
Normal adult human male has

10 gram of haemoglobin/100 gram of blood
24 gram of haemoglobin/100 gram of blood
14 gram of haemoglobin/100 gram of blood
18 gram of haemoglobin/100 gram of blood

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