Verified answer (AI cross-checked + SME reviewed)

Q26 (2026, Immunity) — Correct answer: B. Failure of antigen presentation through MHC class I.

NEET PG 2026Q26microscope PathologyImmunitytier-2 (3/3 verifier agreement)

A tumor cell does not express MHC class I molecules. Despite the presence of tumor-associated antigens, cytotoxic T lymphocytes are unable to recognize the tumor cell. What is the most likely mechanism by which the tumor escapes immune surveillance?

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Memory-based reconstruction

NBE does not officially release NEET PG papers per the 2025 Supreme Court directive. This question was reconstructed from 1 community source: Collegedunia NEET PG 2026 Memory-Based Paper. Cross-verified by Claude Haiku 4.5 + Gemini 2.5 Flash + community-aggregate vote, then reviewed by a practising medical SME.

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