বিসিএস জব সল্যুশন [১০ম - ৫০তম বিসিএস]১টি পরীক্ষায় এসেছেপ্রশ্ন ৪২"Who planted this tree here"? The correct passive voice of this sentence is-কBy whom the tree was planted here?খWho the tree had been planted hereby?গThe tree was planted here by whom?ঘBy whom had the tree been planted here?উত্তর দেখুন