Select the answer that correctly completes the sentence. Mvp tim duncan is widely known for an athletic physique, but not for an effervescent personality.
"I" is in regards to yourself, you and any humans name are proper nouns that you go by. "a" is not a proper noun it is describing the quantity or the subject of the matter, Ex- [I] love it when [a] cool summer day takes place in my area.
{Bad sentence, sorry}