Who is the youngest person to become Congress President?

The youngest President of the Congress was Maulana Abul Kalam Azad, who was elected at the age of 35. While Rahul Gandhi formally took over today aged 47, his father Rajiv Gandhi became Congress President at 41, and his mother Sonia Gandhi was elected at 52. Further, Rahul Gandhi's grandmother, Indira Gandhi was elected when she was 42.