निम्नलिखित में से किस राजनीति वैज्ञानिक ने सबसे पहले भारत में राज्य राजनीति (state politics) के अध्ययन की व्यवस्थित शुरुआत की?

Assertion (A): The formation of Jharkhand state in the year 2000 is often cited as a significant victory of 'identity-based' politics over 'developmental' politics. Reason (R): The Jharkhand Mukti Morcha (JMM) successfully bridged the gap between 'Tribal' (Adivasi) and 'Moolvasi' (Non-tribal local settlers) through the shared 'Jharkhandi' identity from the 1970s onwards.

According to the constitutional expert Subhash Kashyap, how did Rajasthan's history and experience with political defections in the post-Independence era significantly differ from that of other North Indian states?