Detailed Solution:
The correct answer is “Meerut conspiracy case”.
The Meerut Conspiracy Case attracted worldwide publicity and drew sympathetic comments from notable figures such as Albert Einstein, H.G. Wells, Harold Laski, and Franklin D. Roosevelt in favor of the convicts.
It was a controversial court case that was initiated in British Raj in March 1929 and decided in 1933. Several trade unionists, including three Englishmen, were arrested for organizing an Indian railway strike. The British government convicted 27 leftist trade union leaders under a lawsuit.