D-link DSL-2750U hardware version V1 supported openwrt

Can anyone please tell me which is suitable openwrt
firmware for D-link dsl-2750u h/w- V1. Please help its urgent. Thank you in advance.

There is no OpenWrt firmware available for DSL-2750U v1.
In addition to an unsupported SoC (RTL8672), this device has only 32MB flash, which is considered too little for current OpenWrt.

If it is urgent, you should urgently get a device which is supported by OpenWrt and which has sufficient resources in terms of flash + RAM. See https://openwrt.org/toh/views/toh_available_16128 for some inspiration.