Had I not seen this with my own eyes, I ________ it.
Awould believe
Bwill believe
Cwill not have believed
DWould not have believed
Answer:
D. Would not have believed
Read Explanation:
Understanding Third Conditional Inversion
The sentence uses a Third Conditional structure, which describes an unreal situation in the past.
The clause "Had I not seen this..." is an example of inversion. It is a formal way of writing "If I had not seen this...".
In the Third Conditional, the structure of the If-clause is If + Past Perfect (had + V3), and the structure of the main clause is would/could/might + have + Past Participle (V3).