Who told Duryodhana not to go in front of his mother without clothes?

Who told Duryodhana not to go in front of his mother without clothes? Nobody. Additionally, he was not even told to go naked before his mother to turn his body into a vajra. Such an event never happened in Vyasa Mahabharat. This story is widely popularized by TV serials, where, Gandhari instructs Duryodhana to appear naked before her. She is said to have acquired power in her eyes, considering her having kept it closed for years. When she opens her blind fold, Duryodhana's body turns into vajra, by which he turns invincible to be defeated by Bhima during the mace fight. However, his lower body around the waist remains weak, as it is kept covered. When he was heading to the tent to meet Gandhari, Shri Krishna meets sees him walking naked and shames him stating it inappropriate to go before one's mother in this form. However, the above story popularized by TV series is complete fallacy. Here are facts: Gandhari never asked Duryodhana to appear naked before her, so she can turn his body like a vajra. Gandhari was in Hastinapur and nowhere near the Kurukshetra battlefield or in any camp. Duryodhana had practiced 13 years and turned his body into a vajra. It was never pre-decided that Bhima and Duryodhana will indulged in mace fight. Duryodhana had run away from the battlefield and hid under the river. To bring him out, Yudhishthira asks him to come out and fight with any one of his choice. The mace fight was decided spontaneously and not predetermined. Thus, the entire story of Gandhari turning Duryodhana's body into a vajra is false and does not exist in any version of Vyasa Mahabharat