Input credit of service tax

ans of 3)   you can cliam 100% credit

and under reverse charge you have to pay service tax on 75% value.... u need not to understand that if ser provider has paid full service tax so ser rec need not to pay under reverse charge

ans of 1)   u can avail credit on input servi used for providing output service and those service specifically included in the definition of input service whether these are used in output service or not