Asseration Petrified fossils contains hard parts of orginisms
Reason Moulds and casts lack the remains of organisms

Options

A. Both Assertion and Reason are true, but Reason is the correct explanation of Assertion
B. Both Assertion and Reason are true, but Reason is not the correct explanation of Asseration
C. Assertion is true, but Reason is false
D. Asseration is false , but Reason is true

Answer

B

Explanation

Replacemet of organic part s by mineral deposit is called petification of fossil . There fossils are termed as petrifid fossils . These consits of only the hard parts of extinct organisms . Moulds are hardened and fossilsed mud that surrounded an extinct individual. Sometimes , a mould is found with petrified fossil of the indiviual also , Such dossis are termed as casts