Question

isotopes
of carbon and hydrogen

Answer 1

There are three naturally occurring isotopes of carbon: 12, 13, and isotopes of hydrogen: protium (A = 1), deuterium (A = 2), and tritium (A = 3). Protium

Answer 2

There are two isotopes of Carbon
C - 12 & C - 14.

and there are three isotopes of Hydrogen

H-1 -- Monoterium/ Protium

H-2 -- Deuterium

H-3 -- Tritium