Which of the following orders is true regarding the basic nature of ${\mathrm{NH}}_2$ group?

The correct order of basic strength of aromatic amines is o−Toluidine<Aniline>o−Nitroaniline. 

Aniline is more basic than ortho nitro aniline because the presence of electron withdrawing nitro group decreases the ease with which N can donate a lonepair of electrons. 

o-Toluidine is less basic than aniline because whenever a substituent is present in the ortho position, it decreases its basicity.

Electron-releasing group increases the availability of lone pair of electrons on nitrogen while electron attracting group decreases this availability.