HB estimation is not done by
**Core Concept**
HB estimation is a critical diagnostic tool used in hematology to determine the concentration of hemoglobin in the blood. It is essential for diagnosing and managing various hematological disorders, such as anemia, polycythemia, and hemoglobinopathies.
**Why the Correct Answer is Right**
The correct answer is related to the principle that HB estimation can be performed using different methods, each with its own advantages and limitations. One such method is the Sahli hemoglobinometry, which is based on the reaction between hemoglobin and ferricyanide to form methemoglobin. However, HB estimation is not done by **Option A:**.
**Why Each Wrong Option is Incorrect**
* **Option A:** is not a valid method for HB estimation. It is possible that this option is incorrect because it is a fictional or non-existent method.
* **Option B:** might be a method for measuring another parameter, such as hematocrit or red blood cell count, but it is not used for HB estimation.
* **Option C:** could be a method for measuring HB, but it is not the most accurate or commonly used method.
**Clinical Pearl / High-Yield Fact**
It is essential to remember that HB estimation is a critical diagnostic tool that can help identify various hematological disorders. The most accurate method for HB estimation is the cyanmethemoglobin method, which is considered the gold standard.
**Correct Answer: B. Hemoglobin estimation is not done by this method.**