Natural reservoir of phosphorus is

(A)rock
(B)fossils
(C)sea water
(D)animal bones

The NCERT line that answers it

Verbatim line

Atmosphere or hydrosphere is the reservoir for the gaseous type of cycle (carbon), whereas Earth's crust is the reservoir for sedimentary type (phosphorus).

Chapter: Ecosystem
Section: intro ECOSYSTEM
Page: 9
Words matched: 14 of 23

The answer appears as a continuous sentence in NCERT. This is that sentence.

How this line gives the answer

0, emb=1.0, combined=1.0). Verified: high — The span explicitly states 'Earth's crust is the reservoir for sedimentary type (phosphorus)', which directly identifies rock (Earth's crust) as the natural reservoir of phosphorus, distinguishing it from the other options.

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Question text is reproduced from the published NEET 2013 paper for study and commentary. NCERT text is quoted, not redistributed; textbooks remain at ncert.nic.in. Our mapping method, including its measured error rates, is published at /methodology.