KBC 2023, The options of the question – A commercial form of which of these was patented by Isaac Marritt Singer in 1851?
A. Washing machine
B. Sewing Machine
C. Mixie
D. Wet grinder
KBC 2023| A commercial form of which of these was patented by Isaac Marritt Singer in 1851?
KBC 2023, Check the answer to the question- A commercial form of which of these was patented by Isaac Marritt Singer in 1851?
