Step 1: Check statement 1.
Russia has been a long-time ally of Syria and has consistently supported President Bashar al-Assad militarily and diplomatically.
\(\Rightarrow\) Statement 1 is true.
Step 2: Check statement 2.
Saudi Arabia has historically opposed Assad, supporting opposition groups instead.
\(\Rightarrow\) Statement 2 is true.
Step 3: Check statement 3.
Iran is one of Assad’s strongest allies, providing financial and military support.
\(\Rightarrow\) Statement 3 is true.
Step 4: Check statement 4.
“The United President Assad” is factually incorrect and meaningless. Likely a misprint meant to refer to the “United States,” which opposes Assad. As written, it is false.
Thus, the true statements are 1, 2, and 3 only.
\[
\boxed{\text{Answer: B}}
\]