(a) testing of stones
(b) quarrying of stones
(c) dressing of stones
(d) none of the above
Ans :- (b) quarrying of stones

Explanation :- 
Jumper – It is used to make blast hole and more effective in boring a nearly vertical hole or used in quarrying of stone. Some of the quarrying tools are jumper, wedge, pin, hammer, dipper or scraping spoon, tamping bar, primining needle, crow bar.
Dipper – Used to drill hole to the required depth.