**Core Concept**
The t(2,8) translocation involves a chromosomal abnormality where parts of chromosomes 2 and 8 are swapped. This genetic rearrangement affects the _c-myc_ gene, leading to its abnormal expression. The _c-myc_ gene is crucial in cell proliferation and differentiation, and its dysregulation is associated with various types of leukemia.

**Why the Correct Answer is Right**
The t(2,8) translocation is specifically associated with B cell acute lymphoblastic leukemia (B-ALL). This is because the _c-myc_ gene is juxtaposed with the immunoglobulin heavy chain locus on chromosome 8, resulting in its overexpression. The _c-myc_ gene plays a key role in B cell development, and its dysregulation leads to uncontrolled proliferation of B cells. The t(2,8) translocation is considered a marker for B-ALL, particularly in children.

**Why Each Wrong Option is Incorrect**
**Option A:** T cell ALL is associated with a different set of genetic abnormalities, including t(9,22) (BCR-ABL) and t(5,14) (IL3-IGH).

**Option C:** CML is characterized by the t(9,22) translocation, which creates the BCR-ABL fusion gene.

**Option D:** CLL is often associated with deletions of the short arm of chromosome 13 (13q14), deletions of the long arm of chromosome 11 (11q22-23), or trisomy 12.

**Clinical Pearl / High-Yield Fact**
The t(2,8) translocation is a specific marker for B-ALL, and its presence can guide targeted therapy, including the use of tyrosine kinase inhibitors or immunotherapies.

**✓ Correct Answer: B. B cell ALL**