Which radioisotope is naturally occurring?

96242Cm

94238Pu

103258Lr

13H

94 Pu 238 is naturally occurring isotope.

Explanation:

Pu is the heaviest element which is naturally occurring.

Rest Cm and Lr are artificial.

For hydrogen we have only three isotope namely Deutriom Tritium and Hydrogen itself.

13H

Explanation:

All the other options listed are elements of the actinide series most of which are not naturally occurring. Tritium is a naturally occurring isotope of hydrogen believed to be present from the time of the formation of the earth. Due to its short half life of 12.26 years, any tritium present at that time must have decayed. However, it is constantly replenished by stellar reactions in the sun. Tritium is a beta emitter and also has uses in medicine.