Check both columns before deciding a pair is wrong — one wrong item makes the whole pair wrong.
Remember Pisum = papilionaceous flower with diadelphous stamens and single carpel (legume).
Arachis follows papilionaceous trends (diadelphous), not monadelphous.
1. Row I (Pisum): Pisum (pea) has diadelphous stamens (a typical papilionaceous flower condition) — that part of the pair (List-2) is correct. However, "Two carpels" (List-3) is incorrect for Pisum: pea has a single carpel (mono carpellary, forming a single pod). So the Pisum pair is wrong (I is wrong).
2. Row II (Arachis): Arachis (peanut) belongs to Papilionoideae and typical papilionaceous flowers have diadelphous stamens (9+1), not monadelphous (all fused into one). Thus "Monodelphous stamens" is an incorrect descriptor for Arachis — so II is also wrong. The fruit being a dehiscent pod is correct.
3. Row III (Nicotiana): Nicotiana often shows cymose to panicle type inflorescences and the fruit is indeed a capsule — this row is typically correct.
4. Row IV (Ruscus): Ruscus has unisexual flowers and cladophylls (flattened stems) — this is correct.
5. Therefore the wrong pairs are I (Pisum) and II (Arachis). Hence the correct option is (2) I & II.
