A body is moving from rest under constant acceleration and let \[{{S}_{1}}\] be the displacement in the first \[(p-1)\] sec and \[{{S}_{2}}\] be the displacement in the first \[p\,\sec .\] The displacement in \[{{({{p}^{2}}-p+1)}^{th}}\] sec. will be

• A.             \[{{S}_{1}}+{{S}_{2}}\]
• B.             \[{{S}_{1}}{{S}_{2}}\]
• C.             \[{{S}_{1}}-{{S}_{2}}\]     
• D.             \[{{S}_{1}}/{{S}_{2}}\]