As of my knowledge cutoff date in September 2021, here are some popular smart LED TVs from reputable brands that are available in 50-inch size in India:
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Samsung UA50AU8000KXXL 4K UHD Smart TV: This TV offers a 4K Ultra HD resolution, Samsung's Crystal Processor 4K for enhanced picture quality, multiple HDMI and USB ports for connectivity, and smart features with access to popular streaming apps.
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LG 50UP7500PTZ 4K UHD Smart TV: This TV features a 4K Ultra HD resolution, LG's Quad Core Processor 4K for smooth performance, AI ThinQ for voice control and smart features, and multiple HDMI and USB ports for connectivity.
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Sony KD-49X7500H 4K UHD Smart TV: This TV offers a 4K Ultra HD resolution, Sony's X1 4K HDR Processor for vibrant colors and enhanced contrast, Android TV OS with access to Google Play Store and popular streaming apps, and multiple HDMI and USB ports for connectivity.
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TCL 50C715 4K QLED Android Smart TV: This TV features a 4K Ultra HD resolution with QLED technology for vibrant colors, Dolby Vision HDR, Android TV OS with access to Google Play Store and popular streaming apps, and multiple HDMI and USB ports for connectivity.
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Power Guard PG50F4K: This TV offers a 4K Ultra HD resolution, Super Luma Ultra bright screen for flawless picture quality even in bright rooms, X-Motion Clarity, Android TV OS with access to Google Play Store and popular streaming apps, and multiple HDMI and USB ports for connectivity.
Please note that availability and prices may vary depending on the location and retailer. It's always recommended to check the latest prices and features from reliable sources or directly from the respective brand's website or authorized retailers for up-to-date and accurate information before making a purchase decision.