Professor Rajendra said that the incidents narrated by Gaitonde were not real because Gaitonde was in a coma for two days. This means that during the time he claims to have experienced these incidents, he was actually unconscious and unable to perceive or participate in any events.

Explanation:
- Gaitonde's Coma: Gaitonde was in a coma for two days, which means he was in a state of deep unconsciousness. During this time, his brain activity would have been significantly reduced or absent altogether. In such a state, it is not possible for him to have had any real experiences or memories.

- Coma and Perception: When a person is in a coma, they are unable to perceive the outside world or form new memories. Their consciousness is temporarily suspended, and they are completely unaware of their surroundings. Therefore, Gaitonde's claims of experiencing incidents while in a coma are highly unlikely and can be dismissed as products of his imagination or delusion.

- Lack of Evidence: Since Gaitonde was unconscious during the time he claims to have experienced these incidents, there would be no evidence or corroborating accounts to support his claims. Without any external validation or proof, it becomes difficult to accept his narrative as real events.

- Medical Expertise: Professor Rajendra, being a professor, is likely to have a good understanding of medical conditions such as comas. He would be aware of the limitations and effects of being in a coma and would recognize the implausibility of Gaitonde's claims.

- Scientific Approach: As a scientist, Professor Rajendra is likely to rely on facts and evidence rather than subjective accounts. He would want to believe in verifiable facts rather than accepting unfounded claims. Therefore, he dismisses Gaitonde's narration as not real based on the medical understanding of comas and the lack of evidence supporting Gaitonde's claims.

In conclusion, Professor Rajendra states that the incidents narrated by Gaitonde were not real because Gaitonde was in a coma for two days, making it impossible for him to have experienced or remembered any events during that time. This explanation is based on the understanding of comas and the lack of evidence supporting Gaitonde's claims.