Who among the following persons wrote a biography of Mahatma Gandhi?

Who, among the following, wrote the book ‘Bahuvivah’?

Mahatma Gandhi wrote his autobiography originally in:

In which of the following books did Mahatma Gandhi call British Parliament as sterile and prostitute?

Who among the following composed the Harshacharita, the Sanskrit biography of Harshavardhana, the ruler of Kannauj?

Who was the author of the book, Mahatma Gandhi and Bihar : Some Reminiscences?