Assertion: C-horizon is the darker in colour than A-horizon.
Reason: C-horizon is poor in humus content whereas A-horizon is rich in humus content.

Assertion is true and reason is false.

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Both assertion and reason are true.
Reason is the correct explanation of assertion.

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Both assertion and reason are true.
Reason is not the correct explanation of assertion.

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Assertion is false and reason is true.

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Solution

The correct option is D Assertion is false and reason is true.
Humus is rotting dead matter (organic matter) which gives dark colour to the soil.

A-horizon is rich in humus and that's why it is the darkest layer of the soil. C-horizon is poor in humus content. Therefore, C-horizon is light in colour as compared to A-horizon.

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Similar questions

Availability of water and minerals in the soil for maximum absorption by roots is in the –

(a) B-horizon
(b) C-horizon
(c) A-horizon
(d) surface of soil

Match the following and choose the correct option:

i. A - horizon a. Small lumps of rocks

ii. B - horizon b. Hard layer which is difficult to dig

iii. C - horizon c. Dark in colour and rich in humus

iv. R -horizon d. Less humus and more minerals, compact

why humus is present only in a -horizon?

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