1. Tardigrade
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  3. Chemistry
  4. CH 3- CHO xrightarrow[(ii)H2O](i)CH3MgBr(a) xrightarrow H 2 SO 4, Δ (b) Hydroboration oxidation (c) In the above reaction (a) and (c) are

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Q. $CH _{3}- CHO \xrightarrow[(ii)H_2O]{(i)CH_3MgBr}(a) \xrightarrow{ H _{2} SO _{4}, \Delta}$
(b) Hydroboration oxidation (c)
In the above reaction $(a)$ and $(c)$ are

AIIMSAIIMS 2017

Solution:

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Hence, (A) and (C) are positional isomers.