Experts what does this sentence means : "​​हाथ कंगन को आरसी क्या I "

'Hath kangan ko aarsi kya?' ka matlab hai,  prathyaksh ko pariman ki avashykta nahi hoti. In simple words, you don't need mirror to watch the bangles on your hand. When something is a fact already or is known you don't need to prove it unnecessarily.

Hope it helps.