easy A-D ..for practice...lets see who solves it first

shreyan i think ur b is rong.-N3 group will be in the side which experience low steric repulsion.

so D will be benzene diazonium chloride.

ya...i had that confusion...
the epoxide has two ways to open...either from low steric hindrance side, or from more stable carbocation forming side..
msp, how can u say that it will depend on the steric factor here??

for all those who are trying this one.....
structure of D

guys try it .....and finish it off

Hey prititsh nice work dude . but I'd like u to be a bit more interested in drawing the e- transfer arrows in a better way .It helps in having clarity otherwise good work :)

Right. Will see to that next time :)

Ya nice work