Yes, Vivo V11 Pro does have the App clone support. You can run multiple social media and WhatsApp accounts.
Yes, Vivo V11 Pro does have the OTG support.
Yes, You can record 4K videos with Vivo V11 Pro.
No. Vivo V11 Pro does not have the notification LED light but it does have the always-on display.
The Vivo V11 Pro is a solid all-rounder at Rs. 25,990 and offers better value than the Oppo F9 Pro (Review), but for a bit more money. Think of it as a Vivo X21 with a bigger battery and better front camera, but at a much more reasonable price, which is a good recipe.