Assertion : Petrified fossils contain hard parts of organisms.
Reason : Moulds and casts lack the remains of organisms.

Options

A. If both the assertion and the reason are true and the reason is a correct explanation of the assertion
B. If both the assertion and reason are ture but the reason is not a correct explanation of the assertion
C. If the assertion is true but the reason is false
D. If both the assertion and reason are false

Answer

B

Explanation

Replacement of organic parts by mineral deposits is caller petrification. Fossils formed through petrification are termed petrified fossils. These fossils consists of only the hard parts of extinct organisms. Moulds of hardened and fossilized mud that surrounded an extinct individuals have been completely destroyed, but the moulds have retained true copies of their shapes. sometimes, a mould is found with petrified fossil of the individual also.such fossils are termed as casts.