What happens when (give balanced chemical equation and write the names of the reactants and products):
Ethyne reacts with chlorine in the sunlight. 
 

Select the odd one out from the following list of compounds

$\mathrm{A}: {\mathrm{CH}}_4 \mathrm{B}: {\mathrm{C}}_2{\mathrm{H}}_4 \mathrm{C}: {\mathrm{C}}_2{\mathrm{H}}_6 \mathrm{D}: {\mathrm{C}}_3{\mathrm{H}}_8$ (Enter your correct answer as $\mathrm{A}, \mathrm{B}, \mathrm{C} \mathrm{or} \mathrm{D}$)

Select the odd one out with justification from the following list of compounds.

$\mathrm{A}: {\mathrm{CH}}_3\mathrm{COOH} \mathrm{B}: {\mathrm{C}}_2{\mathrm{H}}_5\mathrm{OH} \mathrm{C}: {\mathrm{CH}}_3\mathrm{OH} \mathrm{D}: {\mathrm{C}}_3{\mathrm{H}}_7\mathrm{OH}$ (Enter your correct answer as $\mathrm{A}, \mathrm{B}, \mathrm{C} \mathrm{or} \mathrm{D}$)

Select the odd one out with justification from the following list of compounds.

$\mathrm{A}: {\mathrm{CH}}_4 \mathrm{B}: {\mathrm{C}}_2{\mathrm{H}}_4 \mathrm{C}: {\mathrm{C}}_3{\mathrm{H}}_6 \mathrm{D}: {\mathrm{C}}_4{\mathrm{H}}_8$ (Enter your correct answer as $\mathrm{A}, \mathrm{B}, \mathrm{C} \mathrm{or} \mathrm{D}$)