Maharashtra State PSC 2015 Solved Paper

The Indian flag has evolved gradually. The first flag in India is said to have been hoisted on August 7, 1906 in the Parsee Hagan Square (Green Park) in Calcutta. At a meeting of the All India Congress Committee in 1921 a flag was brought to Mahatma Gandhi. Gandhiji suggested addition of a strip. What colour strip did he suggest ?