Step 1: Understanding the Concept:
This question tests the correct verb form for a sentence in the passive voice.
Step 2: Detailed Explanation:
The sentence structure "Sohan was ........ by a dog" indicates the passive voice. The structure of the past simple passive is: `was/were + past participle`.
The main verb is 'bite'. We need its past participle (third form).
The forms of 'bite' are:
- Base form: bite
- Simple past: bit
- Past participle: bitten
The sentence requires the past participle to follow 'was'.
Step 3: Applying to the Sentence:
The correct form to complete the passive voice structure is 'bitten'.
Step 4: Final Answer:
The correct verb form is bitten.