Among the stability of following:
The correct order of stability is
I < II < III
II < I < III
I < III < II
II < III < I
More the number of α−H′s, more is the stability of alkene.
The correct order for decreasing stability of the following free radicals is
The stability of carbanions in the following
i) RC≡⊖C
ii)
iii) R2C=⊖CH
iv) R3C−⊖CH2
is in the order of