*Estonia March PPI Rises 0.2% On Month

*RBI Raises Cash Reserve Ratio By 25 Basis Points To 6%

*Estonia March Producer Prices Up 1.2% On Year

*India's Central Bank Raises Reverse Repo Rate To 3.75% From 3.5%

*Pound Eases To 1.5308 Against Greenback, 1.6298 Against Swiss Franc And 141.72 Against Yen