Q. Consider the following statements:
1.Calcium-41 is a rare long-lived radioisotope of calcium.
2.Calcium-41 is produced through cosmic ray interactions in the soil and is found in the Earth’s crust.
Select the correct statements using the codes given below:

[A] 1 only

[B] 2 only

[C] Both 1 and 2

[D] Neither 1 nor 2

Answer: C
Notes:

Explanation-

Statement 1 and 2 are correct. Calcium-41 is a rare long-lived radioisotope of calcium. Calcium-41 is produced through cosmic ray interactions in the soil and is found in the Earth’s crust.

Source: ForumIAS