$\mathrm{While} \mathrm{going} \mathrm{on} \mathrm{a} \mathrm{road} \mathrm{lying} 90°\mathrm{right} \mathrm{of} \mathrm{copernicus} \mathrm{marg}, \mathrm{Sushil} \mathrm{realised} \mathrm{that} \mathrm{he} \mathrm{is} \mathrm{on} \mathrm{wrong} \mathrm{path}. \mathrm{If} \mathrm{the} \mathrm{correct} \mathrm{path} \mathrm{was} 180° \mathrm{left} \mathrm{of} \mathrm{the} \mathrm{road} \mathrm{he} \mathrm{is} \mathrm{walking} \mathrm{on} \mathrm{then} \mathrm{what} \mathrm{road} \mathrm{should} \mathrm{he} \mathrm{have} \mathrm{been} \mathrm{on}?$

Given:
Sushil is walking on $90°$ right of Copernicus Marg.

To find:
The road $180°$ left of $90°$ of Copernicus Marg

Calculation:
From the map given, we can visualize that $90°$ right of Copernicus Marg would be towards National Stadium.

Now according to the question the correct way is the $180°$ left of National Stadium, which would be Rajpath.

Hence, Option A is correct.