Xiaomi Mi Pad 4 Related Question and Answer

No

no

There is no official confirmation of this device yet, though it is expected to support OTG. To check all the other details of the device use, this link : Xiaomi Mi Pad 4

Yes, Xiaomi Mi Pad 4 does support split-screen mode. 

Xiaomi Mi Pad 4 is still to be launched in Indian markets so the performance cannot be judged right now. You will have to wait for the Mi Pad 4 to release in Indian markets.