`sqrt(25-12+155+1)=?`

Options

A. 13
B. 14
C. 17
D. 16

Explanation

To solve the expression \( \sqrt{25 - 12 + 155 + 1} \), we will follow these steps:

### Step 1: Simplify the expression inside the square root
We start with the expression inside the square root:
\[ 25 - 12 + 155 + 1 \]

### Step 2: Perform the subtraction
First, we calculate \( 25 - 12 \):
\[ 25 - 12 = 13 \]

### Step 3: Add the results
Now, we add \( 13 + 155 + 1 \):
\[ 13 + 155 = 168 \]
\[ 168 + 1 = 169 \]

### Step 4: Take the square root
Now we take the square root of \( 169 \):
\[ \sqrt{169} = 13 \]

### Final Answer
Thus, the final answer is:
\[ \sqrt{25 - 12 + 155 + 1} = 13 \]

---