India vs UK (in WWI?)

Remember World War I? Of course you don't, but you've read about it, seen movies about it (though not as many as the more popular World War II).I'm happy to report that Americans aren't the only history-challenged folks out there. According to this story, 1 in 4 Indians believe India was fighting the UK in The Great War (WWI). Or, as the story notes:

In reality, India was actually part of Britain when the war started in 1914 (2014 being the centenary of the great war).

 Oops.