system
Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
Doppelganger is-
assistant
The correct answer is  Ans. is `b' i.e., Feeling of double of oneself Doppelgangers (subjective double) is the delusion that there is double of oneself. A person feels that double of himself exists elswhere.