दिए गए वाक्य में वह खंड पहचानिए जिसमें व्याकरण संबंधी त्रुटि है। यदि कोई त्रुटि नहीं है, तो 'No error' चुनें। The timescale of prokaryote evolution / have been difficult to reconstruct / because of a limited fossil record.

Identify which part of the sentence has an error: These kind of trousers/ (A) are rather/ (B) expensive to buy./ (C) No error (D)

Find the part of the sentence that has a grammatical error: 'The citizens of the area longed on rain, which is natural when it is so terribly dry year-round.'