Correct option is A
The correct antonym of the given word is “Astute”.
Obtuse means slow to understand or insensitive.
Hindi Meaning: (जड़बुद्धि , मूर्ख)
Example: He was too obtuse to understand the joke.
Astute means having or showing an ability to accurately assess situations or people and turn this to one's advantage.
Hindi Meaning: (चतुर , कुशाग्र बुद्धि)
Example: She made an astute observation about the company's financial health.
Synonyms: Blunt, dull, insensitive, unintelligent, imperceptive.
Antonyms: Sharp, acute, perceptive, intelligent, clever.
Meanings of other options:
Obese relates to being overweight.
Banal means lacking originality.
Obsolete refers to something out of date or no longer in use.