Match Column-I with Column-II and choose the correct option: 
a i, b ii, c iii, d iv
a ii, b i, c iv, d iii
a i, b iii, c iv, d ii
a iv, b iii, c ii, d i
Match Column-I with Column-II and choose the correct option: 
| Column I (Leaders) | Column II (Role) |
|---|---|
| Ho Chi Minh | iv. Struggle to free Vietnam |
| J.M. Garibaldi | iii. The unification of Italy |
| George Washington | i. American war of independence |
| Clement Attlee | ii. British withdrawal from India |
Draw a rough sketch for the curve $y = 2 + |x + 1|$. Using integration, find the area of the region bounded by the curve $y = 2 + |x + 1|$, $x = -4$, $x = 3$, and $y = 0$.
Study the given molecular structure of double-stranded polynucleotide chain of DNA and answer the questions that follow. 
(a) How many phosphodiester bonds are present in the given double-stranded polynucleotide chain?
(b) How many base pairs are there in each helical turn of double helix structure of DNA? Also write the distance between a base pair in a helix.
(c) In addition to H-bonds, what confers additional stability to the helical structure of DNA?