Укажіть реакцію Вюрца:

CH3-CH2Cl → (+Na, +CH3Cl) CH3-CH2-CH3
CH4 → (+Br2) CH3Br
C4H10 → (t, кат) CH4 + C3H6
CH4 → (+Cl2) CH3Cl → (+Na) CH3-CH3