law of variable proportion economics class 11. পরিবর্তনীয় উপকরণ অনুপাত বিধি।

[@TitasM-ur6xg]

Thank you.sir.

[@alshahriarhabibrajin6804]

great

[@moderatorgamer3177]

thanks for the class, sir

[@lokmanhossain5276]

অসাধারণ ক্লাস

[@escbyasif]

thanks

[@antoraakter28]

Thank you sir

[@riyaparvin7069]

Thanks Sir