;WITH CTE AS (
SELECT
Name,
[Month],
[Year],
Mark,
rn = ROW_NUMBER() OVER(PARTITION BY Name ORDER BY <<Something>>)
FROM tblStudent
)
SELECT
Name,
[Month],
[Year],
Mark
FROM CTE
WHERE rn = 1
For fast, accurate and documented assistance in answering your questions, please read this article.
Understanding and using APPLY, (I) and (II) Paul White
Hidden RBAR: Triangular Joins / The "Numbers" or "Tally" Table: What it is and how it replaces a loop Jeff Moden