MPSC State Service 2020 · GS · Question 48 of 97

Consider the following statements: a. The ratio of 14 C to 12 C changes continuously for dead bodies or plants. b. Radioactive isotope Carbon-14 is used in a Carbon dating technique.

Physics

AStatement (a) is true and is a reason of (b)Correct
BBoth (a) and (b) are not true
C(a) is true but (b) is false
D(a) and (b) are not related to each other

Answer: A. Statement (a) is true and is a reason of (b)

Explanation

Carbon-14 is radioactive and its ratio to Carbon-12 falls steadily after death, which is why C-14 is used for carbon dating: statement (a) is true and is the reason for (b).

Source: MPSC Rajyaseva Prelims 2020 – GS Paper I (Set D), official paper

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