मुहावरा: हँसी-खेल नहीं
वाक्य प्रयोग: परीक्षा में अच्छे अंक लाना हँसी-खेल नहीं, इसके लिए कठिन परिश्रम करना पड़ता है।
The examiner expects the student to: (1) correctly identify the muhavara "हँसी-खेल नहीं" from the given sentence, and (2) use it in a meaningful new sentence. The meaning is "not an easy/trivial task." Keep the sentence simple and relevant. No source passage was needed here as it is a language/grammar-based question.