किसने मोहम्मद अली जिन्ना को 'हिन्दू-मुस्लिम एकता का दूत' कहा 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?