In 1872, the two brand-new plant species A and B were identified. Later, it was discovered that species A's type had never been selected, while species B's type specimen for that species had been designated but was absent. Typification should be done in accordance with the International Code of Botanical Nomenclature (ICBN).

1
neotype for A only
2
neotype for both A and B
3
neotype for A and lectotype for B
4
lectotype for both A and B

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