Who represented India at the first Round Table Conference in 1930?

The First Round Table Conference (1930-31) was boycotted by the Indian National Congress because many leaders (including Gandhi) were in jail after the Civil Disobedience Movement. Those who attended included representatives from princely states, minorities (Muslims, Sikhs, depressed classes), and liberal politicians, but NOT major Congress leaders like Nehru, Gandhi, or Jinnah. Jinnah attended the Second RTC (1931) but was disillusioned by then. Since none of the named leaders attended the First RTC, 'None of these' is correct.