The major product formed in the following reaction is

Concept:

Hydrogenation by R-BINAP refers to a chemical reaction in which a chiral ligand known as R-BINAP ((R) 2,2'-Bis(diphenylphosphino)-1,1'-binaphthyl) is used to facilitate the hydrogenation of unsaturated organic compounds. This process is a type of asymmetric hydrogenation, which is a powerful method for the synthesis of enantiomerically pure (chiral) compounds.

Explanation:

(R)-BINAP is used for reduction of carbonyl groups via hydrogenation. Following major product is formed in the above reaction-

Conclusion:

Hence, the major product formed in the reaction is methyl(3R)-3-hydroxyhexanoate.