Q:

A + B means ‘A is the father of B’
A – B means ‘A is the mother of B’
A @ B means ‘A is the son of B’
A # B means ‘A is the daughter of B’
If A # B – C @ D + E, then how is A related to E?

• 1
  Sister-in-law
• 2
  Mother
• 3
  Sister
• 4
  Daughter