The x and y components of \[\overrightarrow{\text{A}}\] are 4 m and 6 m, respectively. The x and y components of \[(\overrightarrow{A}+\overrightarrow{B}\,)\]are 10 m and 9 m respectively. The magnitude of vector B is:

• A. 19 m    
• B.        \[\sqrt{27}\]
• C. \[\sqrt{45}\]      
• D.        \[\sqrt{50}\]