12. Match Column A with Column B
(A) p-ii, ,q-iv,, r-i and s-iii
(B) p-iii, ,q-iv,, r-i and s-ii
(C) p-iii, ,q-i,, r-iv and s-ii
(D) p-ii, ,q-i,, r-iv and s-iii
13. The dimension of the product of surface tension and length is :
(A) [M L–1 T–1]
(B) [M L T–2]
(C) [M L T–1]
(D) [M L0T–2]
