Correct Answer - A
Answer- A. Mesonephros
The ureteric bud, also known as the metanephrogenic
diverticulum, is a protrusion from the mesonephric duct during the
development of the urinary and reproductive organs.
It later develops into a conduit (channel) for urine drainage from the
kidneys, which, in contrast, originate from the metanephric
blastema.
The metanephrogenic blastema or metanephric blastema (or
metanephric mesenchyme, or metanephric mesoderm) is one of the
two embryological structures that give rise to the kidney, the other
being ureteric bud.

Correct Answer - A
Ans. A....Greater omentum

The portion of the dorsal mesentery that attaches to the greater curvature of the stomach, is known as the dorsal mesogastrium. The part of the dorsal mesentery that suspends the colon is termed the mesocolon. The dorsal mesogastrium develops into the greater omentum.