Haemoglobinic Acid Formation Basics Steps:

• Identify haemoglobinic acid as the product when carbon dioxide reacts with hemoglobin in blood, forming carbaminohemoglobin.
• Evaluate statement 1: Correct, as it involves CO2 binding to amino groups on hemoglobin.
• Evaluate statement 2: Correct, as this reaction occurs in tissues with high CO2 levels, aiding transport.
• Evaluate statement 3: Incorrect, as it does not require oxygen displacement; both can coexist.

Why B is correct:

• B selects statements 1 and 2, matching the accurate description of CO2-hemoglobin binding per blood chemistry principles.

Why the others are wrong:

• A includes incorrect statement 3.
• C omits correct statement 2.
• D includes incorrect statement 3 and omits correct statement 1.

Final answer: B