Mumbai is richer than most other cities in India. (Use superlative degree)

The superlative degree of the given sentence is: Mumbai is the richest city in India.

Explanation of the Transformation

The transformation from comparative to superlative involves several key changes:

• Use of 'the': Superlative adjectives are typically preceded by the definite article 'the'.
• Adjective form: The adjective 'rich' is transformed into its superlative form, 'richest'. This is generally achieved by adding '-est' to short adjectives.
• Scope of comparison: The comparative form compares Mumbai to 'most other cities'. The superlative form implies a comparison to *all* cities in India.

Grammatical Rules Illustrated

This exercise demonstrates the application of fundamental English grammar rules regarding degrees of comparison. Understanding these rules is crucial for effective communication and accurate writing.

Alternative phrasing (less common but acceptable)

While "Mumbai is the richest city in India" is the most natural and concise answer, a slightly more verbose but still grammatically correct phrasing could be: "Mumbai is richer than any other city in India." However, the first option is preferred for its brevity and clarity.

Why other options are incorrect

• "Mumbai is richest in India" - Missing the definite article 'the' makes it grammatically incorrect.
• "Mumbai is the richer city in India" - Using 'the richer' is incorrect; the superlative form 'richest' is required.