If in the International System of Units $[ x ] _ { \mathrm { SI } } = \mathrm { m } , [ t ] _ { \mathrm { SI } } = \mathrm { s } , [ v ] _ { \mathrm { SI } } = \mathrm { m } / \mathrm { s }$

Multiple Choice

If in the international system of units $[ x ] _ { \mathrm { SI } } = \mathrm { m } , [ t ] _ { \mathrm { SI } } = \mathrm { s } , [ v ] _ { \mathrm { SI } } = \mathrm { m } / \mathrm { s }$ , and $[ a ] _ { \mathrm { SI } } = \mathrm { m } / \mathrm { s } ^ { 2 }$ , and (i) $x$ $= v t + a$ , (ii) $x = \frac { 1 } { 2 } a t ^ { 2 }$ , and (iii) $t = \left( \frac { 2 x } { a } \right) ^ { \frac { 1 } { 2 } }$ , the dimensionally consistent equation(s) is(are) :

A) (i) , (ii) , and (iii) .
B) (i) and (iii) .
C) (i) and (ii) .
D) (ii) and (iii) .
E) only (i) .