To answer this question, we need to identify the person described in the given information.
The person referred to in the question is Vidur, and he is the correct answer.
Let's go through each option to understand why it is correct or incorrect:
Option A) Vibhishan - This option is incorrect because Vibhishan is a character from the Hindu epic Ramayana and is not associated with Hastinapur or the events mentioned in the question.
Option B) Shalya - This option is incorrect because Shalya is a character from the Hindu epic Mahabharata, but he is not the son of Rishi Vyas or the servant of Ambika and Ambalika.
Option C) Bali - This option is incorrect because Bali is a character from the Hindu epic Ramayana and is not associated with Hastinapur or the events mentioned in the question.
Option D) Vidur - This option is correct because Vidur is the son of Rishi Vyas, the servant of Ambika and Ambalika, and later becomes the mahamantri (Prime Minister) of Hastinapur. He also witnessed the true form of God in Dhritarastra's court when Krishna was present as the 'shanti dut' or messenger for peace.
The correct answer is D) Vidur.