______ हे पृथ्वीवरील सर्वात बुद्धिमान सस्तन प्राणी आहेत. A. डॉल्फिन B. हत्ती C. हरिण D. पाणघोडे

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.