[caption id="attachment_54398" align="alignnone" width="400"]<img class="size-medium wp-image-54398" src="https://www.marketingmind.in/wp-content/uploads/2021/03/WhatsApp-Image-2021-03-25-at-14.36.59-400x300.jpeg" alt="" width="400" height="300" /> India's Publicis Ambience has placed billboards along the roads of Mumbai, in which a giant blade plays the role of the board itself. The sharpest knife in the world...[/caption]