(A) Branched chain detergents are nonbiodegradable and unbranched hydro-carbon detergents are biodegradable.
(R) Bacteria cannot degrade highly branched hydrocarbon chain.

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Both (A) and (R) are true but (R) is not the correct explanation of (A)

Both (A) and (R) are true and (R) is the correct explanation of (A)

Both (A) and (R) are false

(A) is true but (R) is false

answer is A.

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Detailed Solution

Hydrocarbon chain in some detergents is highly branched, then bacteria cannot degrade this easily.
Slow degradation of detergents leads to their accumulation.
Effluents containing such detergents reach the rivers, ponds, etc.
These persist in water even after sewage treatment and cause foaming in rivers, ponds and streams and their water gets polluted.
So, both (A) and (R) are true and (R) is the correct explanation of (A).

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