## **Core Concept**
Thalassemia is a genetic disorder affecting hemoglobin synthesis, leading to variable degrees of anemia, growth retardation, and other complications. Screening for thalassemia involves identifying carriers of the mutated gene, particularly in populations with a high prevalence of the disease. A family history of thalassemia increases the likelihood of an individual being a carrier.

## **Why the Correct Answer is Right**
The correct answer involves **Complete Blood Count (CBC) and Peripheral Blood Smear** or more specifically for thalassemia screening, **Hemoglobin Electrophoresis** or **High-Performance Liquid Chromatography (HPLC)**. However, for initial screening, especially in someone with a family history, **CBC** is often the first step. It helps in assessing the severity of anemia and provides an **Mean Corpuscular Volume (MCV)** and **Red Cell Distribution Width (RDW)**, which can indicate microcytic hypochromic anemia, a hallmark of thalassemia.

## **Why Each Wrong Option is Incorrect**
- **Option A:** While certain genetic tests can diagnose thalassemia, they are not typically the first line for screening unless the individual is already known to be a carrier or has a confirmed diagnosis.
- **Option B:** This option might seem plausible but is not specific or commonly recommended for initial screening in the context provided.
- **Option C:** Similarly, this option does not directly relate to a commonly used initial screening test for thalassemia.

## **Clinical Pearl / High-Yield Fact**
A crucial point to remember is that for thalassemia screening, especially in populations with a high risk or family history, **CBC** is a useful initial test. It can help identify individuals with microcytic anemia, which may warrant further testing like hemoglobin electrophoresis for definitive diagnosis.

## **Correct Answer:** .