জব সল্যুশন [৯ম - ১৩তম গ্রেড]১টি পরীক্ষায় এসেছেপ্রশ্ন ২৫Iron is the most useful metal-The positive form of the sentence is-কক) Very few metals are as useful as iron.খখ) Iron is as useful as many other metals.গগ) No other metal is as useful as Iron.ঘঘ) Iron is useful than many other metals.উত্তর দেখুন