Question

Match the Column I with Column II with reference to biomagnification of DDT.

Column (I) (Organism)	Column (II) (DDT content)
i.	Small fishes	a.	0.04 ppm
ii.	Fish eating Birds of Prey	b.	0.5 ppm
iii.	Large fishes	c.	25 ppm
iv.	Zooplankton	d.	2.ppm

Choose the correct option:

• A. i-b, ii -d, iii -c, iv -a
• B. i-b, ii -c, iii -d, iv -a
• C. i-c, ii-b, iii-a, iv-d
• D. i-d, ii -b, iii - c, iv -a

Hint:

DDT concentration rises at each higher trophic level.

Answer 1

The Correct Option is B

Step 1: Understanding the Concept
In biomagnification, DDT concentration increases along the food chain.

Step 2: Order
Zooplankton: 0.04 ppm (a).
Small fishes: 0.5 ppm (b).
Large fishes: 2 ppm (d).
Fish-eating birds: 25 ppm (c).

Step 3: Result
This gives i-b, ii-c, iii-d, iv-a.

Final Answer:
The correct matching is i-b, ii-c, iii-d, iv-a. \[ \boxed{\text{(B) }\text{i - b, ii - c, iii - d, iv - a}} \]