Select the grammatically correct version of the following sentence.
He was youngest than his brother.

Correct option is A

The correct substitution of the sentence is (a) He was younger than his brother.
Explanation:
The word "younger" is the comparative form of "young", used when comparing two people.
"Youngest" is a superlative and should not be used when comparing only two.
Grammatical rule used:
· Comparative adjective + than is used to compare two persons or things.
· Example: He is taller than his brother.
�� Information Booster: Use "younger" for two, and "youngest" only when comparing more than two.