Who addressed Gandhiji as ‘one-man boundary force’?

Which one of the following Jails was named as ‘Mandir’ by Gandhiji?

Who of the following called Gandhiji ‘’Mahatma’’ for the first time?

Who among the following was called by Gandhiji as his Rajya Guru in May 1915?

Which of the following Round Table Conference was attended by Gandhiji?

Who was first selected by Gandhiji for Individual Satyagraha?