৫১তম বিসিএস ফাইনাল মডেল টেস্ট ও রিভিশন৩২১টি পরীক্ষায় এসেছেপ্রশ্ন ৫৭Identify the correct sentence.কক) One of the students was selected to visit NASA.খখ) One of the student was selected to visit NASA.গগ) One of the students were selected to visit NASAঘঘ) One of the student were selected to visit NASAউত্তর দেখুন