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Q.
The compound X is
NTA AbhyasNTA Abhyas 2022
Solution:
Hydroboration - oxidation reaction of alkenes leads to anti-Markovnikov's hydration. Further addition of water adds in syn-manner, i.e., $H$ and $OH$ are added to the same face of the double bond leading to formation of trans-product. In short, hydroboration-oxidation of alkenes is regioselective as well as stereoselective.
The compound X is