See above.Today is parents' Day. I am happy because my exam results are good. Last year I came second in my class. Now I come first. My sister is unhappy because she failed her exam. She comes last in class this year.
1.I wonder if it is natural to say 'I came second in my class'? Yes, it's natural.
2. Is it correct to use simple present tense if we are talking about the examination results this year? Not really. It would sound better if you said "This year, I came first".
3. Is it correct say examination result instead of examination results? It depends on the sentence. Please post a sentence using both and we can see how you want to use it. You have not used either phrase in your piece.
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