Swadeshabhimani Ramakrishna Pillai exiled on

Earth day is celebrated in :

Universal Declaration of human rights was passed by the U N. General Assembly on:

Right to information Act (RTI ) became effetive in India on 15 th June :

The year in which Panchayati Raj was introduced in India :

The arrival of Vasco da Gama at Calicut  was a landmark event in the annals of history. In which year did he arrive in Kerala?