Match the column-I and column-II
| Column-I | Column-II |
| (i) Viroid | (a) Ramachandran |
| (ii) Cell | (b) Leewenhoek |
| (iii) Virus | (c) T.O. Diener |
| (iv) Triple helical structure of collagen | (d) Ivanowsky |
(1) i-b, ii-a, iii-c, iv-d
(2) i-a, ii-b, iii-d, iv-c
(3) i-c, ii-b, iii-d, iv-a
(4) i-d, ii-b, iii-c, iv-a
