A well planned racket has been unearthed in Indian Railways recently. The scam is related to:

A) Sale of spurious food items on platforms and coaches.

B) Railway branch water 'Rail Neer'

C) Supply of substandard electric items

D) Over/under invoicing of goods transported by trains.

This MCQ is part of the UP PSC Previous Year Questions (PYQs) series, focusing on UPPSC Prelims 2016 (GS Paper I)