Correct answer: (b) Only three
Explanation
- A
Only two
Only two. Three pairs hold. That under-counts.
- 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.
- C
Only four
Only four. That would need mint or papaya to be right. Both fail.
- 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.
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