Consider the following pairs:Plant DescriptionI.Cassava : Woody shrubII.Ginger : Herb with pseudostemIII.Malabar spinach : Herbaceous climberIV.Mint : Annual shrubV.Papaya : Woody shrubHow many of the above pairs are correctly matched?

1. A

   Only two

   Only two. Three pairs hold. That under-counts.

2. B

   Only three

   Only three. I Cassava — woody shrub (tapioca). II Ginger — herb with a pseudostem of leaf sheaths. III Malabar spinach (Basella) — herbaceous climber. IV Mint is a perennial herb spreading by rhizomes, not an annual shrub. V Papaya is a large herb with a succulent stem, not a woody shrub.

3. C

   Only four

   Only four. That would need mint or papaya to be right. Both fail.

4. D

   All the five

   All five. Mint and papaya are the two mismatches.

Summary. Official key is (b) only three pairs. Cassava is a woody shrub, ginger a herb with a pseudostem, Malabar spinach a herbaceous climber. Mint is a perennial herb, not an annual shrub; papaya is a giant herb, not a woody shrub. (a) under-counts; (c)(d) keep mint or papaya.