1 Answers

Option 1 : Only I

Consider the following least possible Venn diagram, 

[ alt="13 sep 2017 S3 10" src="//storage.googleapis.com/tb-img/production/18/07/13%20sep%202017%20S3_10.JPG" style="height:224px; width:241px">

Conclusions:

I. All cups are red → True (It is definitely true as shown in the diagram).

II. All plates are cups → False (It is possible but not definite).

III. All red are plates → False (It is possible but not definite).

Hence, only conclusion I follows.

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