The question asks:

Among the following compounds, which can be dehydrated very easily?

However, the structures/options A, B, C, D are missing in the prompt. Since dehydration of alcohols depends strongly on the structure of the alcohol, the answer cannot be derived rigorously without seeing the compounds.

1. Principle involved

Dehydration of alcohols generally proceeds most easily when the reaction can form the most stable carbocation (in acid-catalyzed dehydration).

The usual ease of dehydration is:

Also, alcohols that form allylic or benzylic carbocations dehydrate especially easily due to resonance stabilization.

So, the compound that dehydrates most easily is typically the one that gives the most stable carbocation/intermediate.

2. Limitation here

Since the actual compounds corresponding to A, B, C, and D are not shown, I cannot independently verify which one is easiest to dehydrate.

3. Comparison with stored answer

The stored correct answer is A. Because the options are missing, I cannot truly check it from first principles. I therefore cannot confidently confirm or reject it based on the given data.

If you provide the structures of options A–D, I can evaluate them one by one and determine the correct answer properly.