📌 The Question:
Consider the following plants:

1. Groundnut
2. Horse-gram
3. Soybean

How many of the above belong to the pea family?

(a) Only one
(b) Only two
(c) All three
(d) None

✅ Correct Answer: (c) All three

⚡ Lightning Classroom Explanation:

🔹 The pea family is botanically known as Fabaceae (Leguminosae).
It is one of the most important plant families for agriculture, soil fertility, and human nutrition.

🌱 Plant-wise Breakdown:

• 1. Groundnut — Correct ✅
  Groundnut (Arachis hypogaea) belongs to the family Fabaceae.
  It is a legume with the unique habit of geocarpy (fruit develops underground).
• 2. Horse-gram — Correct ✅
  Horse-gram (Macrotyloma uniflorum) is a traditional Indian pulse crop and a legume, belonging to Fabaceae.
• 3. Soybean — Correct ✅
  Soybean (Glycine max) is a globally important leguminous crop, rich in protein and oil, and a classic member of Fabaceae.

➡️ Thus, all three plants belong to the pea family.
✔️ Answer: (c) All three

🧠 Curiosity Raiser:
👉 Most legumes, including these three, host Rhizobium bacteria in their root nodules, naturally fixing atmospheric nitrogen and enriching soil fertility.

📚 Enrich Notes (UPSC Edge):

• Fabaceae characteristics:
  • Pod-like fruit (legume)
  • Compound leaves with stipules
  • Nitrogen fixation (soil-friendly crops)
• Major legumes in India:
  • Pulses (gram, lentil, pigeon pea)
  • Oilseeds (groundnut, soybean)

🕊️ IAS Monk Whisper:
“Legumes don’t just feed humans — they quietly heal the soil beneath our feet.”