I do not wish to comment on the present C-SAT controversy in the UPSC examination.
However, I wish to say that we in India cannot do without English. That is because all scientific knowledge today is in English. If one goes to any engineering college he will find all the books are in English. So also in Medical Colleges or scientific institutes. For progress of our country knowledge of modern science is absolutely essential.
Moreover it is not only for learning science that knowledge of English is necessary. If one goes to a lawyer's office he will find all the books in his library are in English. Most of the history and biography books are in English.
The Allahabad High Court celebrates Hindi Diwas every year. When I was a Judge there the office bearers of the High Court Bar Association would come to meet me and request me to attend. I would tell them that it is better I do not attend because I will say things which some people may not like, and then there will be a controversy. But they would press me to come. When I went to the function I heard some speakers say " Angrezi dasi hai " ( English is a slave girl ), or Angrezi hatao ( abolish English ). When my turn came to speak I said that English is a window to much of modern knowledge, so how can we do without it ? I would also say that in fact English should be spread further, and your children's future depends on learning English. Don't you care for your childrens' future ? I would add that Hindi is my mother tongue too, and I love it, but that does mean that I should behave like a fool.
Those who say that in Germany, France, Russia, etc scientific books are in the mother tongues forget that in those countries there have been scientific books in those languages for a very long time, often over a century. On the other hand in India they are all in English. Translating even one book may take several years. So it is better to learn English and read them in English.
For more on the subject, read my articles: