You are given a question and three statements. Identify which of the statements is/are necessary/sufficient to answer the question:
Question:
In which year was Aarti born?
Statements:
I. Aarti is six years older than Pranavi.
II. Pranavi's sister was born in 1982.
III. Aarti's sister is two-years younger than Pranavi's sister, who is eight years younger than Pranavi.

Options

A. Only I and II
B. Only II and III
C. Only I and III
D. All I, II and III

Answer

D

Explanation

From II, we know that Copal.s brother was born in 1982.
From III, we find that Gopal.s brother was 8 years younger to him i.e. Gopal was born in 1974.
From I, we find that Sanjay is 6 years older than Gopal. Thus, Sanjay was born in 1968.