What is the name of that system, which uses radioactivity to decide the period of materials of pre-historic period?

(1) Radium dating

(2) Uranium dating

(3) Carbon dating

(4) Deuterium dating

** Answer:** (3) Radiocarbon dating (usually referred to as simply carbon dating) is a radiometric dating method that uses the naturally occurring radioisotope carbon-14 (14C) to estimate the age of carbon-bearing materials up to about 58,000 to 62,000 years.