Option A : Fertilised eggs at 4 to 6 cells - stages are recovered non-surgically from super-ovulating cow and transferred to surrogate mother. This statement is incorrect. In MOET, fertilised eggs or embryos are usually recovered from the super-ovulating cow at around the 8-32 cell stage, not at the 4 to 6 cell stages. This is the primary error in the statement. Option B : It is used to increase herd size in a short time. This statement is correct. MOET is indeed used to rapidly increase the size of a herd, by allowing one cow to produce multiple offspring in a relatively short period of time. Option C : Cow is administered with hormones to induce super-ovulation. This statement is correct. In MOET, the cow is given hormones to stimulate the release of multiple eggs (super-ovulation), which can then be fertilised and transferred to surrogate mothers. Option D : Super-ovulating cow is either mated with an elite bull or is artificially inseminated. This statement is correct. The super-ovulating cow is either naturally bred with a high-quality bull or artificially inseminated to ensure fertilisation of the multiple eggs. Therefore, the correct answer is Option A because it incorrectly states the stage at which fertilised eggs are recovered from the cow in MOET.