The \[x\] and \[y\] coordinates of a particle at any time \[t\] are given by \[x=7t+4{{t}^{2}}\] and \[y=5t\], where \[x\] and \[y\] are in metre and \[t\] in seconds. The acceleration of particle at \[t=5\]s is [SCRA 1996]

• A.             Zero    
• B.             \[8\,\,m/{{s}^{2}}\]
• C.             20 \[m/{{s}^{2}}\]  
• D.             40 \[m/{{s}^{2}}\]