Reasoning : Logical Reasoning & Analytical Ability

Q 190 / 325

UPSC CSE Prelims 2017

Consider the given information and answer the three questions that follow. A, B, C, D, E, F and G are Lecturers from different cities such as Hyderabad, Delhi, Shillong, Kanpur, Chennai, Mumbai and Srinagar (not necessarily in the same order) who participated in a conference. Each one of them is specialized in a different subject, namely in Economics, Commerce, History, Sociology, Geography, Mathematics and Statistics (not necessarily in the same order). Further:

  1. Lecturer from Kanpur is specialized in Geography.
  2. Lecturer D is from Shillong.
  3. Lecturer C from Delhi is specialized in Sociology.
  4. Lecturer B is specialized in neither History nor Mathematics.
  5. Lecturer A who is specialized in Economics does not belong to Hyderabad.
  6. Lecturer F who is specialized in Commerce belongs to Srinagar.
  7. Lecturer G who is specialized in Statistics belongs to Chennai.

Who is specialized in Geography?

EXPLANATION

Correct Option (1)

B

Explanation

Based on the provided information, the specializations and cities of the lecturers can be systematically deduced through a series of logical steps:

  • Lecturer C is from Delhi and specializes in Sociology (Rule 3).
  • Lecturer F is from Srinagar and specializes in Commerce (Rule 6).
  • Lecturer G is from Chennai and specializes in Statistics (Rule 7).
  • Lecturer D is from Shillong (Rule 2).

Considering Lecturer A:

  • A specializes in Economics and does not belong to Hyderabad (Rule 5).
  • The remaining unassigned cities are Hyderabad, Kanpur, and Mumbai. As per Rule 1, Kanpur is associated with Geography. Since A is not from Hyderabad, A must be from Mumbai.
  • Therefore, Lecturer A is specialized in Economics and is from Mumbai.

Considering Lecturer B:

  • Lecturer B is specialized in neither History nor Mathematics (Rule 4).
  • Rule 1 states that the lecturer from Kanpur is specialized in Geography.
  • Given the established assignments and Rule 4, Geography is the only remaining subject for B that is not History or Mathematics.
  • Consequently, Lecturer B is specialized in Geography and is from Kanpur.

This deduction confirms that Lecturer B is specialized in Geography.

Incorrect Options

  • Option 2 (D): Lecturer D is from Shillong. Based on the complete deduction, D's specialization is either History or Mathematics, not Geography.

  • Option 3 (E): Lecturer E is from Hyderabad. Based on the complete deduction, E's specialization is either History or Mathematics, not Geography.

  • Option 4 (Cannot be determined as data is inadequate): The provided information is sufficient to definitively determine the specialization of each lecturer, including who specializes in Geography.