[2025-10-01T17:03:20.453034] [QUERYOME] Starting research for query 277: 'Instructions:
 Answer the question below. First, respond with the single best option letter (A, B, C, or D). Then provide a concise reasoning (1–3 sentences). Use both the retrieved evidence and your own medical knowledge to choose the most accurate answer.

Question:
Naive T cell get activated by:

Options:
A. NK cell
B. Dendritic cell
C. Macrophage
D. B-lymphocyte'
[2025-10-01T17:03:20.493843] [PI] Starting research for query: 'Instructions:
 Answer the question below. First, respond with the single best option letter (A, B, C, or D). Then provide a concise reasoning (1–3 sentences). Use both the retrieved evidence and your own medical knowledge to choose the most accurate answer.

Question:
Naive T cell get activated by:

Options:
A. NK cell
B. Dendritic cell
C. Macrophage
D. B-lymphocyte'
[2025-10-01T17:03:20.496357] Saving text to bench_final/run1/medmcqa/medmcqa_1837/pi_initial_prompt.txt
[2025-10-01T17:03:20.509507] [PI] Calling o3 for initial analysis...
[2025-10-01T17:03:32.397045] [PI] Reasoning iteration 1
[2025-10-01T17:03:32.398595] [PI reasoning] **Exploring T cell activation options**

I’m focused on answering the question about which cells activate naive T cells. The options are NK cells, dendritic cells, macrophages, and B-lymphocytes. It’s well-known that naive T cells need activation from professional antigen-presenting cells, and dendritic cells are the most effective due to their strong costimulatory signals. Macrophages and B cells can activate already primed T cells but not naive ones. So, I’m selecting dendritic cells as the correct answer. I'll gather some supporting evidence with a quick search.
[2025-10-01T17:03:32.409201] [PI] Executing function call 1: hybrid_search
[2025-10-01T17:03:32.412073] [PI] Function arguments: {'query': 'naive T cell activation dendritic cells are the most potent antigen presenting cells primary activation of naive T lymphocytes', 'k': 5, 'faiss_weight': 0.6, 'bm25_weight': 0.4, 'use_rrf': True}
[2025-10-01T17:03:32.413573] Saving JSON to bench_final/run1/medmcqa/medmcqa_1837/pi_iteration_1_tool_call_2_hybrid_search.json
[2025-10-01T17:03:34.552522] [PI] Function hybrid_search executed successfully
[2025-10-01T17:03:34.554078] Saving JSON to bench_final/run1/medmcqa/medmcqa_1837/pi_iteration_1_tool_result_2_hybrid_search.json
[2025-10-01T17:03:34.559870] [PI] Continuing reasoning with 1 function responses...
[2025-10-01T17:03:41.478133] [PI] Reasoning iteration 2
[2025-10-01T17:03:41.481343] [PI] No function calls found in response
[2025-10-01T17:03:41.483236] [PI] No more function calls - research complete
[2025-10-01T17:03:41.484738] Saving text to bench_final/run1/medmcqa/medmcqa_1837/pi_final_answer.txt
[2025-10-01T17:03:41.489382] [QUERYOME] Query completed successfully
