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Assertion & Reason types:(A) Prickly pear cactus introduced in Australia in 1920s became inveasive.(R) The physical environment was optional for its growth and reproduction.

$\begin{array}{1 1}(a)\;\text{Both statements are correct & (R) is the correct explanation of (A)} \\ (b)\;\text{Both statements are correct & (R) is not the correct explanation of (A)} \\(c)\;\text{(A) is correct,(R) is false} \\(d)\;\text{(A) & (R) both are incorrect}\end{array}$

1 Answer

Its natural predator was absent.
(Physical environment was optional in mainland too)
Hence (b) is the correct option.
answered Mar 24, 2014 by sreemathi.v

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