English Wizard১টি পরীক্ষায় এসেছেপ্রশ্ন ৬In a formal letter, the superscription refers to -কDate, designation & address of the recipientখSalutation like “Dear Sir/ Madam”গRecipient’s detailed designation & address on the envelopeঘClosing phrase like “Yours faithfully”উত্তর দেখুন