Logical deduction – Batman enters ⇒ Superman exits: "Superman exits from the window, when Batman enters from the door." Choose the valid pair. (i) Superman exits from the window. (ii) Batman enters from the door. (iii) Superman does not exit from the window. (iv) Batman does not enter from the door.

Introduction / Context:The structure is BatmanEnters ⇒ SupermanExits. So whenever (ii) holds, (i) must also hold.

Given Data / Assumptions:

• No converse is stated.

Concept / Approach:Pick the pair that asserts both the antecedent and the necessary consequent: (ii) and (i). The option lists them as (i) (ii), which is still the same pair of truths.

Step-by-Step Solution:

Verification / Alternative check:Pairs (iii) (iv) or (iv) (iii) jointly negate both and are not consequences.

Why Other Options Are Wrong:They neither reflect the implication nor provide a necessary connection.

Common Pitfalls:Interpreting the wording as biconditional.

Final Answer:(i) (ii)