red flag meaning in Hindi

In the late 1930s , these youngsters were convinced that the Union Jack would soon make room for the red flag in Delhi .
1930 के दशक के अंत में इन युवाओं को पक्का यकीन था कि दिल्ली में जळी ही यूनियन जैक की जगह लल ज्हंड़ा लहराएगा .

noun.

something that irritates or demands immediate action; "doing that is like waving a red flag in front of a bull"
the emblem of socialist revolution
a flag that serves as a warning signal; "we didn''t swim at the beach because the red flag was up"