Rahul is supposed to have finished his project work by now Basic rule
Right Answer is: A
Basic rules to be followed for Active/Passive conversions are:
1. The object of the active verb becomes the subject of the passive verb.
2. The finite form of the verb is changed (to be+ past participle).
3. The subject of the active sentence becomes the object of the passive sentence (or is dropped).
4. Preposition ‘by’ is used before object.
‘Suppose’ in the passive if followed by present infinitive, may convey an idea of duty, an expectation, a belief about something and is not therefore normal equivalent of suppose in the active. In this question it is clearly an idea of duty. Hence option A is the correct answer.