How many Kingdoms are there?

There are 5 kingdoms

Explanation:

The scheme most often used currently divides all living organisms into five kingdoms: Moneran (bacteria), Protista, Fungi, Plantae, and Animalia. This coexisted with a scheme dividing life into two main divisions: the Prokaryote (bacteria, etc.) and the Eukaryotae (animals, plants, fungi, and protists).

i believe the answer would be:

d. violin, clarinet, french horn, and tuba

force required to detach it is given by

charges are taken to be fundamental charge

now we have

so above is the minimum distance at which it will detach