Which of the following organohalogen compound when heated with alcoholic KOH does not undergo dehydrohalogenation reaction :

Which one of the following organohalogen compounds when heated with alcoholic potassium hydroxide does not undergo dehydrohalogenation reaction?

Which one of the following halogen compounds when heated with alcoholic potassium hydroxide does not undergo dehydrohalogenation reaction?

Which of the following will undergo fastest elimination with alcoholic KOH ?

Which of the following mixtures when heated in alcoholic KOH gives carbylamine test?