Q.
$CH_3 - CH_2-CH_2 - \overset{\underset{||}{O}}{C}-ONa \ce{->[\text{Kolbe's}][\text{(aq. electrolysis}]} X $
$\ce{->[Cr_2O_3, Al_2O_3][\Delta \& pr]} Y$
Solution:
Correct answer is (c)

Solution: