a) size of hole = nominal diameter of fastener – clearances
b) size of hole = nominal diameter of fastener x clearances

c) size of hole = nominal diameter of fastener / clearances

d) size of hole = nominal diameter of fastener + clearances

Answer: d
Explanation: Size of hole = nominal diameter of fastener + clearances
Clearance may be standard size, oversize, short slotted or long slotted.