The velocity of a particle depends upon as \[v=a+bt+c{{t}^{2}}\]; if the velocity is in \[m/\sec \], the unit of \[a\] will be [CPMT 1990]

• A. \[m/\sec \]
• B. \[m/{{\sec }^{2}}\]
• C. \[{{m}^{2}}/\sec \]
• D. \[m/{{\sec }^{3}}\]