Questions

Informal summit held in Sochi, Russia.

Goods and Services Tax (GST)  will replace  all  central  as well as  state taxes  by  a  single  tax.  GST  will subsume  various  Central  indirect taxes,  including  the  Central  excise duty,Countervailing  duty,  Service tax,  etc.  It  also  subsumes  State Value Added Tax(VAT), Octroi and entry    tax,    Luxury    tax,    etc. Petroleum  products  like  kerosene, naphtha  and  LPG  will  be  under GST,  while  five  items,  including crude oil, natural gas, aviation fuel, diesel    and    petrol    have    been excluded.    Alcohol    for    human consumption will be out of GS

The meanings of the given words are as follows:
Nefarious: (typically of an action or activity) wicked or criminal
Sloppy: careless and unsystematic; excessively casual
Flurry: a small swirling mass of something, especially snow or leaves, moved by sudden gusts of wind

Unassertive: (of a person) not having or showing a confident and forceful personality

Ignoble: not honourable in character or purpose
Modest: unassuming in the estimation of one's abilities or achievements
Subtle: (especially of a change or distinction) so delicate or precise as to be difficult to analyse or describe
Gregarious: (of a person) fond of company; sociable
Magnanimous: generous or forgiving, especially towards a rival or less powerful person
Iniquitous: grossly unfair and morally wrong
Atrocious: horrifyingly wicked
Therefore, it can be observed that option E i.e.

‘iniquitous, atrocious’ forms a synonym- synonym pair of ‘nefarious’.