The Geosynchronous Satellite Launch Vehicle (GSLV-Mark III) is the heaviest rocket in the Indian kitty and so the eyes are fixated at it.

Here were many nations who were thinking that India’s most recent feat would not materialize.
India proved the whole world and even history wrong when it became the first nation to send its satellite in the Martian orbit in the very first trial itself. No other nation did it in the first trial. China and Japan failed despite trying merely a few years ago.