Mumbai, April 1 -- Kaushalya Infrastructure Development Corpn Ltd, Keynote Financial Services Ltd, DRC Systems India Ltd and Fischer Medical Ventures Ltd are among the other losers in the BSE's 'B' group today, 01 April 2025.Punjab & Sind Bank tumbled 20.00% to Rs 34.81 at 14:32 IST.The stock was the biggest loser in the BSE's 'B' group.On the BSE, 18.15 lakh shares were traded on the counter so far as against the average daily volumes of 1.18 lakh shares in the past one month.Kaushalya Infrastructure Development Corpn Ltd crashed 8.00% to Rs 831.15. The stock was the second biggest loser in 'B' group.On the BSE, 2 shares were traded on the counter so far as against the average daily volumes of 104 shares in the past one month.Keynote Fin...