Found 4 phrases starting with IG:

IG	Initialism of I guess.	Rate it:
ignorance is bliss	Lack of knowledge results in happinessSometime you are more comfortable if you dont know something.	Rate it:
Ignorance is Bliss	When you are glad, it is better to be unaware of bad things	Rate it:
ignorantia juris non excusat	Ignorance of the law is not a valid excuse.	Rate it:

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A can of spinach

B hamburger

C cookie

D hot dog