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(1) If both Assertion (A) and Reason (R) are True and the Reason (R) is a correct explanation of the Assertion (A).
(2) If both Assertion (A) and Reason (R) are True but Reason (R) is not a correct explanation of the Assertion (A).
(3) If Assertion (A) is True but the Reason (R) is False.
(4) Assertion (A) is False but Reason (R) is True.
Assertion (A): CO forms weak bonds to Lewis acids such as \( \mathrm{BF}_{3} \). In contrast \( \mathrm{CO} \) forms strong bonds to transition metals.
Reason (R): \( \mathrm{CO} \stackrel{\sigma}{\longrightarrow} \mathrm{BF}_{3} ; \mathrm{CO} \underset{\pi}{\stackrel{\sigma}{\rightleftarrows}} \) Transition metal
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