Which sentence is written correctly? a. rajeev practices harder than anyone else in the orchestra. b. no one can be as impatient as my younger brother can. c. my friend sam draws better than anyone in our art class. d. his poem was shorter than all the poems.

The statement that was correctly written is this: Rajeev practices harder than anyone else in the orchestral.
Looking carefully at all the sentence given above, it can be seen that it is only the sentence in option A that obeys all the needed grammatical laws. The other three sentences are not grammatically correct. The correct sentences for the other options are listed below:
B. No one can be as impatient as my younger brother.
C. My friend, Sam draws better than anyone else in our art class.
D. His poem was shorter than all the other poems.