**Core Concept**
A hemolytic anemia is characterized by the premature destruction of red blood cells (RBCs), resulting in a decrease in the body's red blood cell mass. This can be due to intrinsic RBC defects, immune-mediated mechanisms, or external factors that damage RBCs.

**Why the Correct Answer is Right**
The correct answer is a condition where RBCs are destroyed at a rate faster than they can be produced. This can be due to various factors such as genetic mutations, enzyme deficiencies, or autoantibodies that target RBCs. For example, glucose-6-phosphate dehydrogenase (G6PD) deficiency is a genetic disorder that leads to hemolysis in response to oxidative stress. Similarly, autoimmune hemolytic anemia (AIHA) is an immune-mediated condition where the immune system produces autoantibodies against RBCs.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is not a hemolytic anemia. Instead, it's a type of anemia characterized by a decrease in the production of RBCs.

**Option B:** This option is incorrect because it's a type of anemia characterized by a decrease in the size of RBCs, not hemolysis.

**Option D:** This option is not a hemolytic anemia. Instead, it's a type of anemia characterized by a decrease in the number of RBCs due to bone marrow failure.

**Clinical Pearl / High-Yield Fact**
It's essential to remember that hemolytic anemias can be caused by a wide range of factors, including genetic disorders, immune-mediated mechanisms, and external factors. A thorough history, physical examination, and laboratory investigations are necessary to determine the underlying cause of hemolytic anemia.

**Correct Answer: B. Sickle Cell Anemia**