<prompt> Which weight loss regime decreases risk of gall bladder stone2 -3 Lt water per day2 - 3 Kg wt loss monthVery low calorie dietHigh fat diet  <response>: Answer- B. 2 - 3 Kg wt loss monthRkk of gall stone formation in obese persons during active weight loss seems to increase in an exponential fasion. The data suggest that rates of weight loss should not exceed an average of 7.5 kg per week 