Wood often floats on top of water. This is why for thousands of years, trees have been cut down and then floated down river to be processed into planks and boards. Explain what density is, compare the
density of wood and water, and why the wood floats instead of sinking

c is having 4 valence electrons and is bonded to three hydrogens and one sulphur atom, therefore, the number of bond pair is equal to four. as all the valence electrons are used in forming the bonds so, there is no lone pair left on carbon.

s is having 6 valence electrons and is bonded to one other sulfur atom and one carbon atom, therefore, the number of bond pair is equal to 2. as only two valence electrons are used in forming the bonds so, four electrons are left. therefore, two lone pairs are present on s.

4d^55s^1 ( third choice)