<u>Answer:</u> The correct answer is Option A and Option B.
<u>Explanation:</u>
Double displacement reaction is defined as the chemical reaction in which exchange of ions takes place.
The general equation for this reaction follows:

For the given options:
<u>Option A:</u> 
This is considered as a double displacement reaction.
<u>Option B:</u> 
This is considered as a double displacement reaction.
<u>Option C:</u> 
This is considered as a single displacement reaction because more reactive metal (zinc) is displacing a less reactive metal (hydrogen).
<u>Option D:</u> 
This is considered as a synthesis reaction because copper and oxygen are combining in their elemental state to produce a single compound.
Hence, the correct answer is Option A and Option B.