Rajan highlighted the GDP deflators. India switched to the SNA 2008 system which the UN developed(UNESCO certified?) back in early 2015.

This looks good on paper, but the devil is in the details. The SNA system is just a framework. It still leaves a lot of room for how you want to implement it, including the GDP deflators.

The problem in India is that service GDP growth is deflated with WPI, which makes no sense since WPI is more heavily weighted towards industrial prices. This gives it an artifically low deflator, which boost real GDP.

A second problem is that India does not use so-called 'double deflation' in deflating manufacturing(because manufacturing these days is not just factory work, a lot of auxiliary services is also included). This means, in simple English, that you should use both WPI and CPI inflation to deflate the nominal growth in manufacturing. Yet India does not do this.

There are other deep issues with the way the GDP figures in India is calculated, but this is what Rajan was flagging. He wasn't the only one, either.