Select the grammatically correct sentence from the given options.
Show answer & explanation
Correct answer: C
Explanation
The correct answer is option 3 i.e. The Nile is the longest river in the world with a length of approximately 6650 km
Error concept: Incorrect use of superlative and preposition.
What is wrong: In options 1, 2, and 4, phrases like “most long”, “with a length about approximately”, or “long river” are grammatically incorrect. The correct superlative form of long is longest, and the preposition of should be used with length.
Grammatical concept: Superlative adjectives require correct formation, and expressions indicating measurement use “length of approximately”.
Incorrectness of the concept in context: Using most long or about approximately is redundant and ungrammatical.
How to correct: Use longest and length of approximately.
Correct phrase/ correction: longest river … length of approximately
Final sentence: The Nile is the longest river in the world with a length of approximately 6650 km.
Hence, the chosen option is correct.