Draw the skeletal structures of two different molecules that are each made of 5 carbon atoms and 12 hydrogen atoms. !

Explanation:

1)

     HH H H H  

      |   |   |   |  |

H- C-C-C-C-C-H

      |   |   |   |   |

     H H H H  H

This one can be written as

CH3 - CH2 - CH2 - CH2 - CH3

2)

       H H  H  H  

         |   |    |   |  

  H  -C- C-C- C-H

         |    |   |    |

        H  H  |    H

            H -C-H

                  |

                 H

This one can be written as  

CH3 - CH2 -CH -CH3

                     |

                    CH3

explanation:

i think option no d is the correct answer