Answer:
Solution: Infinitely many
C is correct
Explanation:
Given:

It is a linear equation of single variable. To simplify the linear equation using
(Addition property of equality / Subtraction property of equality)
Combine like term and simplify left side
So, -2y and 2y cancel out and we get

Here both sides same value and this is true statement.
Therefore, The number of solution will be infinite.
Hence, Infinitely many solution