৪৯তম বিসিএস ⎯ ফলিত রসায়ন [৫৪১]১টি পরীক্ষায় এসেছেপ্রশ্ন ১৭৫Which of the following correctly matches a special glass type with its primary functional application and key property?কLead glass – X-ray shielding – High density and high refractive indexখPhotochromic glass – Display panels – Permanent color change under UV exposureগAluminosilicate glass – Microwave oven doors – High electrical conductivityঘFused silica glass – Optical fibers – High thermal expansion and low optical clarityউত্তর দেখুন