Does Apple's World Travel Adapter Kit work in India?
The adapter shown below, in Apple's World Travel Adapter Kit, will work in India.
I'd save your money & pick something up when you get there, in the airport. All airports carry a supply of foreign > home country adapters, for just such occasions.
The Apple kit looks like it has adaptor for UK, US, EU, Australia - which is pretty wide, but not total coverage.
There are 15 different IEC plug standards worldwide - some are interchangeable, like the European C/E/F types, but most are not.
India predominantly uses plug type D, whilst the UK uses type G - totally incompatible.
The D might be the same pin-width as a type C/E/F, but you won't find out until you get there. ...Like when you discover your shaver plug is a different width to everything except the socket on the hotel bathroom mirror.
There's a good pictorial guide at WorldStandards : Plug & pocket types or the 'official' source at the IEC - http://www.iec.ch/worldplugs/
Most of the business hotels use universal sockets, which accept most of the plugs, except the IEC Type E/F (Schuko releated types), but you loss the ground contact.
I found the new UK type (IEC Type G) works best with these sockets, as it also has ground contacts, and as I live in Europe, the easier to get.
I also found, there are local Apple Stores (franchise shops, not run by Apple) in the newly built malls, which sells the standard 5W and 12W adapters with offical IND plugs (IEC Type D with 2 prongs). They cost around 1700 Rupees for the 12W power adapter.