बार-बार आने वाली विनाशकारी बाढ़ के कारण निम्नलिखित में से किस नदी को 'बिहार का शोक' कहा जाता है?

With reference to the Mahi River basin, consider the following pairs: Feature — Description I. Vindhya Range — Source region of the river II. Aravalli hills — Northwestern hilly terrain of the basin III. Deccan Plateau — Deltaic deposition zone of the river How many of the above pairs are correctly matched?

Which of the following river systems forms the largest delta in India and the world?