The correct option is D Herd size
MOET full form
MOET stands for Multiple ovulation and embryo transfer technology (MOET).
Process of MOET
MOET involves production of 6 - 8 eggs instead of one per cycle (called superovulation), collecting the embryos after fertilisation by a superior male and transfer of developing embryos to surrogate mothers for further development. MOET increases the reproductive rates of superior females and maintains their efficiency by not allowing them to become pregnant. At the same time it allows the normal females to produce good progenies with good qualities like milk production and disease resistance.
It is a well adapted breeding method in cattle and livestock for increasing the herd size.
Final answer
b. Herd size.