What is the location of a parent node for any arbitary node i?

(a) (i/2) position

(b) (i+1)/ position

(c) floor(i/2) position

(d) ceil(i/2) position

The above asked question is from Binary Heap topic in chapter Heap of Data Structures & Algorithms I

This question was posed to me by my school teacher while I was bunking the class.