Match List-I with List-II:

List-I (Name of Scientist)	List-II (Discovered)
A. James Wilson	(I) Nitrogen-fixing bacteria
B. Winogradsky	(II) Host plant resistance
C. R.H. Painter	(III) Hybrid wheat
D. S.S. Bains	(IV) Relay cropping

Choose the correct answer from the options given below:
(a) [A]-(I), [B]-(II), [C]-(III), [D]-(IV) (b) [A]-(IV), [B]-(II), [C]-(III), [D]-(I) (c) [A]-(III), [B]-(I), [C]-(II), [D]-(IV) (d) [A]-(III), [B]-(IV), [C]-(I), [D]-(II)

Correct option is C

Correct matching: Option (c)
(A)-(III), (B)-(I), (C)-(II), (D)-(IV)
Explanation of correct pairs:
· James Wilson → Hybrid wheat (III)
· James Wilson contributed to the development and promotion of hybrid wheat.
· His work focused on improving wheat productivity through hybridization.
· Winogradsky → Nitrogen-fixing bacteria (I)
· Winogradsky is known for discovering chemoautotrophic and nitrogen-fixing bacteria.
· He explained the role of microorganisms in nutrient cycling.
· R.H. Painter → Host plant resistance (II)
· R.H. Painter proposed the concept of host plant resistance.
· He explained how plant traits can reduce pest and disease damage.
· S.S. Bains → Relay cropping (IV)
· S.S. Bains is associated with the concept of relay cropping.
· This system involves sowing the next crop before harvesting the previous one.
➡️ Hence, option (c) exactly matches all scientists with their correct discoveries.
❌ Why other options are incorrect
Option (a):
· Incorrect pairing of Winogradsky and R.H. Painter.
· Relay cropping is wrongly linked.
Option (b):
· James Wilson is incorrectly matched with relay cropping.
· Nitrogen-fixing bacteria not related to S.S. Bains.
Option (d):
· Winogradsky is incorrectly linked with relay cropping.
· Host plant resistance is not associated with S.S. Bains.
�� Key Points to Remember
· Winogradsky → Nitrogen-fixing bacteria
· R.H. Painter → Host plant resistance
· James Wilson → Hybrid wheat
· S.S. Bains → Relay cropping