2007 General Studies, all questions

UPSC Prelims 2007 · General Studies

Question 124: Science and Technology

Which on the following is the correct sequence in order of decreasing length of the three structural parts given below of small intestine in the human body?

aJejunum – Duodenum – Ileum
bIleum – Duodenum – Jejunum
cJejunum – Ileum – Duodenum
dIleum – Jejunum – Duodenum

AnswerThe answer is (d).

The small intestine, about 6 m long, has three parts. The ileum is the longest (about 3.5 m), the jejunum is about 2.5 m, and the duodenum is the shortest at about 25 cm. So the decreasing order of length is ileum, jejunum, duodenum.

Why each option is right or wrong
  • (a) Puts the jejunum above the ileum; the ileum is longer.
  • (b) Puts the duodenum above the jejunum; the duodenum is the shortest.
  • (c) Puts the ileum below the jejunum; wrong.
  • (d) Correct: ileum, jejunum, duodenum.

Explanation: written by UPSC Grade, not by UPSC.

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Source: UPSC, Civil Services (Preliminary) Examination 2007, General Studies. UPSC's own paper isn't online; the words are from a published compilation. The paper on upsc.gov.in.