Question

Each question contains six statements followed by four sets of combination of three. Choose the set in which the statements are logically related.
Statements:
(i) X and Y are siblings.
(ii) X and Y do not quarrel.
(iii) Siblings are known to quarrel often.
(iv) X and Y quarrel often.
(v) All those who quarrel are siblings.
(vi) X and Y cannot be siblings.

• A. (ii), (iv), (v)
• B. (i), (iv), (vi)
• C. (i), (iii), (iv)
• D. (i), (ii), (v)

Hint:

Look for a general statement + a specific instance $\Rightarrow$ a specific conclusion (universal $\Rightarrow$ particular).

Answer 1

The Correct Option is C

From (i) \emph{“X and Y are siblings”} and the general rule (iii) \emph{“Siblings are known to quarrel often”}, it follows for the specific case that (iv) \emph{“X and Y quarrel often.”}
Thus, (i) + (iii) $\Rightarrow$ (iv) form a valid logical chain.
Options (a), (b), and (d) each contain either contradictions \big((ii)\ \text{vs}\ (iv);\ (i)\ \text{vs}\ (vi)\big) or an invalid converse \big((v): \text{‘All who quarrel are siblings’}\big), so they are not logically related.