ब्रिटिश नमक एकाधिकार के खिलाफ महात्मा गांधी द्वारा आयोजित अहिंसक विरोध प्रदर्शन, दांडी मार्च किस तारीख को समाप्त हुआ 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?