Correct option is B
✅ (b) Stone weevil (
Sternochetus mangiferae): • A quarantine pest of mango due to its internal feeding nature. • Larvae bore into the mango stone, making fruits unfit for export. • Strict phytosanitary measures are taken against its spread to non-endemic areas.
❌ (a), (c), (d): • Harmful but not considered quarantine pests like the stone weevil.