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Model Paper 4 — BIOLOGY STD 12 Science — Question

Rajasthan BoardEnglish MediumSTD 12 ScienceBIOLOGYModel Paper 41 Mark
MCQ
Acquired Immunity is characterized by-
  • A
    Antigen specificity
  • B
    To differentiate
  • C
    To keep memory
  • D
    All of the above
✓

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