2011 CSAT, all questionsPassage-I · as printed by UPSC 
UPSC Prelims 2011 · CSAT
Question 65: Reading Comprehension

He soon fell asleep because
ahe was exhausted
bhe was all alone
che had not slept for days
dhe was very frightened
UPSC published no Prelims answer keys before 2012.
Source: UPSC, Civil Services (Preliminary) Examination 2011, General Studies Paper II (CSAT), Series A. The paper on upsc.gov.in.