Ruthfords gold-foil expirement proved the existence of which of the following?

During the gold-foil experiment, alpha rays containing positively charged alpha particles were passed through a thin gold foil. Most rays pass through the gold foil proving that the most part inside an atom is empty. Very few alpha particles could not pass through the foil as those were deflected backward due to the repulsive force of similar charges. This proved the existence of positive charges (protons) in a small region ( at the center of  an atom) known as nucleus.  

explanation:

venn diagram is pictorial representation with of circles showing the relation between two finite sets or things. the intersection part of two circles conveys the relation present in between those sets or things.

here in the venn diagram of sand and salt two circles represent sand and salt. but the area falling under the intersection of these circle represents the mixture of sand and salt.

so, in a venn diagram the mixture will be placed in a middle that is in between the intersection of two circles.

d

explanation: