How do you spell Deduction

Available Definitions:
1)  n. - Act or process of deducing or inferring.
2)  n. - Act of deducting or taking away; subtraction; as, the deduction of the subtrahend from the minuend.
3)  n. - That which is deduced or drawn from premises by a process of reasoning; an inference; a conclusion.
4)  n. - That which is deducted; the part taken away; abatement; as, a deduction from the yearly rent.