The best way to buy gold this Akshaya Tritiya - Sovereign Gold Bond Scheme 2017-18 – Series I
e-Gold is an electronic form of holding gold, issued by Reserve Bank India on behalf of the Government of India.
The issue price of the Gold bonds is Rs.2901 per gram which is lesser than the nominal value. These gold bonds are in demat form, and unlike physical gold gives you an interest of 2.50% annually additional to whatever appreciation happens on the underlying gold value.
The link to apply for these bonds through Zerodha is here.