______ భూమిపై అత్యంత తెలివైన క్షీరదాలు. A. డాల్ఫిన్స్ B. ఏనుగులు C. జింక D. హిప్పోస్

Dolphins are generally regarded as the most intelligent mammals after humans. They have large brains relative to body size, use complex communication, recognise themselves in mirrors and solve problems.