Select the correct passive form of the given sentence.

Professor Sehgal will organise a webinar on investment tomorrow.

A webinar on investment will be organised by Professor Sehgal tomorrow.

The correct passive form of the given sentence is A webinar on investment will be organised by Professor Sehgal tomorrow.

The active voice of the sentence is Professor Sehgal will organise a webinar on investment tomorrow. This sentence is in the simple future tense, which is used to describe an action that will happen in the future. The passive voice of the sentence is formed by putting the subject of the active sentence after the verb "to be" and the past participle of the main verb. In this case, the subject of the active sentence is "Professor Sehgal" and the main verb is "organise." The past participle of "organise" is "organised." So, the passive form of the sentence is A webinar on investment will be organised by Professor Sehgal tomorrow.

The other options are incorrect because:

• A webinar on investment is going to be organised by Professor Sehgal tomorrow. is in the future progressive tense, while the original sentence is in the simple future tense.
• A webinar on investment will have been organised by Professor Sehgal tomorrow. is in the future perfect tense, while the original sentence is in the simple future tense.
• A webinar on investment is being organised by Professor Sehgal tomorrow. is in the present progressive tense, while the original sentence implies that the webinar is not an ongoing event.