Identify the segment that contains a grammatical error. If there is no error, select ‘No error’.
Here, in truth, lies/the crux of the/great problem of all.

Correct option is B

Option (b) contains an error.
· Explanation: The phrase "great problem of all" is incorrect because the adjective "great" should be in the superlative form when followed by "of all". The correct phrase is "the greatest problem of all" to show the highest degree of comparison among all problems.
· Grammatical rule used:
· Rule of Superlative Degree: When comparing more than two elements, especially with the phrase "of all", we use the superlative form of the adjective.
· Correct structure: "the + superlative adjective + of all"
· Explanation of the grammatical rule in Hindi:
· जब हम "of all" का प्रयोग करते हैं, तो हमें adjective का superlative रूप (जैसे greatest, best, tallest) का प्रयोग करना होता है।
· Example:
· Incorrect: This is the good problem of all.
· Correct: This is the greatest problem of all.