Select the INCORRECTLY spelt word.

Correct option is A

Option (a) is the incorrectly spelt word.
Correct spelling is: "Acquaintance" – a person one knows slightly or casually. (परिचित व्यक्ति)
Part of Speech: Noun
Explanation: The word derives from the root "acquaint," meaning to make known or familiar. The "cqu" cluster is a typical part of the spelling and must not be omitted.
Example: She ran into an old acquaintance at the conference.
Meanings of all options:
· (a) Aquaintance ❌ – Incorrect spelling
· (b) Treacherous – Dangerously unstable or disloyal (धोखेबाज़)
· (c) Serendipity – Finding something good without looking for it (सुखद संयोग)
· (d) Malicious – Intending to harm or do evil (दुर्भावनापूर्ण)