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Option 3 : Either I or II follows

Consider the following least possible Venn diagram,

[ alt="IQ UP Police FT6 3 Dec 2018 37Qs hindi images Q9" src="//storage.googleapis.com/tb-img/production/18/12/IQ_UP%20Police%20FT6_3%20Dec%202018_37Qs_hindi_images_Q9.PNG">

Conclusions:

I. No Colour is a Mobile → False (It is possible but not definite).

II. Some Mobile are Colour → False (It is possible but not definite).

Since conclusion I and II form complementary pair.

Hence, either conclusion I or II follows.
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