महात्मा गांधी द्वारा अखिल भारतीय स्तर पर शुरू किया गया पहला जन आंदोलन कौन सा था?

The Karachi Session of the Indian National Congress was held in the year ________ and was presided over by ________.

Where was the 'India House' organization, founded by Shyamji Krishna Varma in the early twentieth century, based?