मद्रास राज्य का नाम बदलकर आधिकारिक रूप से तमिलनाडु किस वर्ष किया गया था?

Arrange the following events associated with Sardar Patel's integration of Princely States into the Indian Union in the correct chronological sequence: A. Signing of initial Standstill Agreements and Instruments of Accession prior to August 1947. B. Formation of United State of Kathiawar (Saurashtra) merger. C. Plebiscite held in Junagadh following the flight of Nawab Mahabat Khan III. D. Military action (Operation Polo) executed in the state of Hyderabad. Choose the correct answer from the options given below:

What was the name of the regional political movement launched in 1972 in the Andhra region of Andhra Pradesh?