Q:

The following sentence has been split into four segments. Identify the segment that contains a grammatical error.
 Rehan and Ronit are / good friends and / it don’t matter to them / as to who is wealthier.

• 1
  good friends and
• 2
  it don’t matter to them
• 3
  Rehan and Ronit are
• 4
  as to who is wealthier.