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Option 4 : either I or II and conclusion III follows.

The least possible Venn diagram is given below:

[ alt="F1 Samarth 22.1.21 Pallavi D2" src="//storage.googleapis.com/tb-img/production/21/01/F1_Samarth_22.1.21_Pallavi_D2.png" style="width: 294px; height: 41px;">

Conclusions:

I. All ovens micro ovens → False (it is possible but not definite).

II. Some ovens are not micro ovens → False (it is possible but not definite)

III. Some plates can be ovens → True (It is possible).

As the conclusion I and II are complementary pairs so either or case is followed.

Hence, the correct answer is either I or II and conclusion III follows.

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