Destroyer Orgo #84

[prsndwg]

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Can someone help me with #84 destroyer 2009..
Its about E2 reaction and which one is the fastet and cyclohexan ring and t-butane and Iodine on it!

Thanks

 

[jorasic]

This one's easier than you think.

For E2 reactions, where do you deprotonate?
From the anti-coplanar side. And the more exposed that Hydrogen is, without any bulky group being all up in its face, the better.
Choice B is good because the I is facing the same side as the Huge trimethyl, so that means the Hydrogen that will be deprotonated will be from the back side facing behind.

I know, Destroyer's explanation is a bit over the head WOOSH~~~