Select the correct answer.
the european buckthorn was introduced to north america as an ornamental plant. however, this plant is now a major threat to many
ant is now a major threat to many
woodlands across the continent. the european buckthorn was introduced to north american woodlands through which vector?
a. accidental escape
b. intentional release
c. climatic conditions
d. accidental transport

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.