OPSC OAS 2019 PrelimsScience & TechnologyQuestion 11
Solved previous year question from the OPSC OAS/OCS 2019 Preliminary Examination (General Studies), with the official answer key and a detailed explanation.
Question
Human blood is red in colour because of the presence of:
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Show answer & explanation
Answer & Explanation
Correct answer: (A) Haemoglobin in red blood cells
Haemoglobin, the iron-containing pigment in RBCs, gives blood itsred color when oxygenated.

