Penalty enforcement.

[Buckeyes]

Team A has the ball 2nd 7 from the 50, they throw an interception. After the interception, there is holding on B then a block in the back on A. Then after the tackle A has a late hit. The hold was on B's 25 & the block in the back at the 35. B return the ball to A's 20. Where is it B's ball at??? We took it to B's 25 & wlked off the dead ball foul. Correct??