​A breakthrough in cancer therapy is expected where T-cells are taken from a patient, are modified in the laboratory to attack cancer cells before re-infusion in the patient. These T cells are called:​

Correct option is B

Explanation-

Option b – "Chimeric Antigen Receptor (CAR) T cells"
This is the correct and precise term. In CAR-T therapy, T-cells are modified to express chimeric antigen receptors (CARs) that allow them to recognize specific proteins on cancer cells. It is one of the biggest breakthroughs in cancer treatment (especially for blood cancers like leukemia and lymphoma).

Incorrect options-

Option a – "Cancer associated receptor T cells"
This is not a standard or recognized term in cancer immunotherapy. It is a misleading and vague option.
Option c – "Chimeric B and T cells"
This is incorrect terminology. B-cells and T-cells are different types of lymphocytes and not combined into "chimeric B and T cells" in any standard therapy.
Option d – "Cancer antigens recognition T cells"
Although T-cells do recognize cancer antigens, this is a generic description, not the name of the therapy or cell type. It lacks the specificity of CAR-T terminology.

So, the correct answer is option b - Chimeric Antigen Receptor (CAR) T cells.
​