Q.
Column I Column II
A image p image
B image q image
C image r image
D image s image

 48  173 Hydrocarbons Report Error

Solution:

Bulky base, Hofmann elimination, less substituted alkene as in (R) is obtained
Simple base, Saytzeff elimination, more substituted alkene as in (p) is obtained
Same explanation as in (a)
Same explanation as in (b)