Examine the following relationships among members of a family of six persons A, B, C, D, E and F. I. > The number of males equals that of females. II. > A and E are sons of F. III. > D is the mother of two, one boy and one girl. IV. > B is the son of A. V

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Q: 135 (IAS/2000)
Examine the following relationships among members of a family of six persons A, B, C, D, E and F.
I. The number of males equals that of females.
II. A and E are sons of F.
III. D is the mother of two, one boy and one girl.
IV. B is the son of A. V. There is only one married couple in the family at present.
Which one of the following inferences can be drawn from the above ?

question_subject: 

Logic/Reasoning

question_exam: 

IAS

stats: 

0,11,5,2,11,2,1

keywords: 

{'inferences': [0, 1, 0, 0], 'relationships': [0, 1, 2, 1], 'husband': [0, 3, 2, 1], 'married couple': [0, 0, 1, 0], 'family': [0, 1, 0, 0], 'females': [4, 3, 4, 1], 'daughter': [1, 2, 4, 5], 'males': [0, 0, 0, 1], 'sons': [0, 1, 1, 1], 'mother': [4, 3, 4, 7], 'son': [0, 3, 0, 3], 'children': [0, 0, 1, 0]}

From the given information:

I. The number of males equals that of females.

II. A and E are sons of F.

III. D is the mother of two, one boy and one girl.

IV. B is the son of A.

V. There is only one married couple in the family at present.

Based on these statements, we can draw the following inference:

A is the husband of D.

This inference can be made because statement IV states that B is the son of A, and statement III states that D is the mother of two children. Therefore, A must be the husband of D.