Which technological advancement originated during the Gupta period in India? Geometric grid system, Sanskrit, two arm balance scale, metallurgy

could you give me the options ?

the pogroms became known as kristallnacht, the "night of shattered glass," for the shattered glass from the store windows that littered the streets. the morning after the pogroms 30,000 german jewish men were arrested for the "crime" of being jewish and sent to concentration camps, where hundreds of them perished.