Question

why parallel connection of resistors gives minimum resistance​

Answer 1

Answer:

When resistors are connected in parallel, more current flows from the source than would flow for any of them individually, so the total resistance is lower. Each resistor in parallel has the same full voltage of the source applied to it, but divide the total current amongst them.

Answer 2

Answer:

Because the current can flow in all the circuits and if one resistor resists the flow the others may not resist.