Two statements are given, followed by three conclusions numbered I, II and III. Assuming the statements to be true, even if they seem to be at variance with commonly known facts, decide which of the conclusions logically follow(s) from the statements.  Statements: All Birds are Sparrows. All Sparrows are Reptiles.  Conclusions: I. Some Reptiles are Birds. II. All Reptiles are Sparrows. III. All Birds are Reptiles. ?

LohaHridoy
  1. Both conclusions I and II follow.
  2. Neither conclusion I, nor II, and III follow.
  3. Both conclusions I and III follow.
  4. Both conclusions II and III follow. 

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AhmedNazir

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Option 3 : Both conclusions I and III follow.

Statements:

All Birds are Sparrows.

All Sparrows are Reptiles. 

The least possible diagram for the given statements is as follows

[ alt="F1 Savita-SSC 1-4-22 D7" src="//storage.googleapis.com/tb-img/production/22/04/F1_Savita-SSC_1-4-22_D7.png" style="width: 185px; height: 130px;">

Conclusions:

I. Some Reptiles are Birds → True (Because all birds are sparrows and all sparrows are reptiles so definitely some reptiles are birds)

II. All Reptiles are Sparrows → False (It is possible but not definite)

III. All Birds are Reptiles → True (Because all birds are sparrows and all sparrows are reptiles)

Hence, “Both conclusions I and III follow” is the correct answer.

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