The RBI is likely to reduce the key interest rate by 25 basis points this week after keeping it on hold for two years, complementing the Union Budget initiatives to push consumption-led demand, though the sliding rupee continues to be a concern.As the retail inflation has remained within the Reserve Bank's comfort zone (less than 6 per cent) for most of the year, the central bank can take rate action to boost growth hit by sluggish consumption, opined experts.