Check the following three statements: 1) Kamla is not Ravi's wife. 2) Premlata is Ravi's mother. 3) Sita is the only daughter-in-law of Premlata. What conclusion can be drawn from the above mentioned statements?

Start with the three statements. Statement 2 makes Ravi a son of Premlata. Statement 3 says Sita is the only daughter-in-law, meaning the only wife of one of Premlata's sons. Statement 1 rules out Kamla as Ravi's wife, which is a hint that Ravi has a wife, and the only candidate in the statements is Sita. So the conclusion is that Sita is Ravi's wife.

• A (Kamla is sister of Sita): Nothing links Kamla and Sita by blood. Wrong.
• B (Premlata is mother of Amla): The statements say nothing about Amla. Wrong, and the option looks like a typo for Ravi.
• C (Sita is Ravi's wife): Correct. It follows from the 'only daughter-in-law' statement combined with the 'not Ravi's wife' statement.
• D (Kamla is daughter-in-law of Premlata): Statement 3 says Sita is the only daughter-in-law, so Kamla cannot be one. Wrong.

This is a syllogism-and-relations question from the Reasoning section. The skill is reading family relations exactly as stated, without adding facts that are not there.

Trap: Aspirants read statement 1 as a clue about Kamla's relation to the family and pick D. Statement 1 only removes Kamla from the role of Ravi's wife, and statement 3 removes her from the role of daughter-in-law.