Service tax input credit

Sir

1. A Company work contarct with B company and after B company Charge bill  to A company Contarct work+ Srevice Tax 40%. (in abdement scheme .)

B company collecet Amount from A company and Paid to Govt siervice tax (40 % on work contract Value ) in abdement scheme .

Then after A compnay can aviled service tax input credit ?

if no than what optioon open to  A company?