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Statements : 1. All chairs laugh.

                    2. Some birds Laugh

Conclusions : 1. All Chairs are birds

                     2. Some birds are chairs

                      3. Those who do not laugh are not chairs

                     4. Some birds do not laugh

  1. 2 follows
  2. 1 follows
  3. 2,4 follows
  4. 4 follows
  5. none follows
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Statements : 1. All chairs laugh.

                    2. Some birds Laugh.

conclusion -

1. All Chairs are birds                                  - false.

2. Some birds are chairs                             - false.

3. Those who do not laugh are not chairs- true.( because all chairs laugh. )

4. Some birds do not laugh                           - false. ( if some birds laught, it doesn't mean that some do not laugh, because some birds laugh may also mean all birds laugh. 

ans- only 3.

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