C-09-Q017mediumsingle_mcqহীরাতে আলোর বেগ কত?a3×1083 \times 10^{8}3×108 m/sb2×1082 \times 10^{8}2×108 m/sc2.26×1082.26 \times 10^{8}2.26×108 m/sd1.24×1081.24 \times 10^{8}1.24×108 m/s