Chennai: B2B agri-marketing platform Ninjacart on April 10 said it has raised Rs 37 crore ($5.5 million) in series B funding from investors, including Accel Partners, Nandan Nilekani’s NRJN Trust, Mistletoe, Qualcomm Ventures and M&S Partners. Ninjacart, which about 1,000 farmers sell f…