Given below in co

Triangular law of addition states that if two vectors form two sides of a triangle taken in the same order then vector addition of the two vectors completes the third side of the triangle.

From this it is clear that,

In figure(i),

So,

Option (c) matches with figure (i)

In figure(ii),

So,

Option (d) matches with figure (ii)

In figure(iii),

So,

Option (b) matches with figure (iii)

In figure(iv),

Option (a) matches with figure (iv)

Option (a) matches with figure (iv)

Option (b) matches with figure (iii)

Option (c) matches with figure (i)

Option (d) matches with figure (ii)