i would like to recommend PANDA Wireless devices like PANDA PAU06 and PAU09 which work for me perfectly and do support injection.
https://www.amazon.in/Panda-Wireless...ds=panda+pau06
https://www.amazon.in/gp/customer-re...SIN=B00JDVRCI0
These adapters are really promising with a nice wireless card (Ralink RT5372).