Option (1) is correct: A has committed no offence as only picking of something on the road is no offence.
Option (2) is incorrect: Theft is dishonestly taking property from the possession of other without his consent.
Option (3) is incorrect: Dishonest misappropriation and conversion of the property for one's own use is called criminal misappropriation of property.
Option (4) is incorrect: Not an offence under the Indian Penal Code.