Assertion : Lithium carbonate is not so stable to heat.
Reason : Lithium being very small in size polarizes large `CO_(2)^(3)` ion leading to the fomation of more stable `Li_(2) )O` and `CO_(2)`

Options

A. Assertion is correct, reason is correct, reason is a correct explanation for assertion.
B. Assertion is correct, reason is correct, reason is not a correct explanation for assertion
C. Assertion is correct, reason is incorrect
D. Assertion is incorrect, reason is correct.

Explanation

Both Assertion and Reason are true but Reason is not the correct explanation of statement - 1. ` [Fe ( CN) _ 6 ]^ ( 3 - ) ` is weakly paramagnetic as it unpaired electrons while ` [Fe (CN) _ 6]^ ( 2 - ) ` has no unpaired electron.
` therefore ` It is diamagnetic.